CN110622932A - Sexual attractant for Spodoptera frugiperda and supporting trapping device and usage method - Google Patents

Abstract

The invention discloses a sexual attractant for Spodoptera frugiperda, a matching trapping device and a using method. The pheromone of the fall armyworm sex attractant is composed of cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis-7-dodecene acetate, cis- 9-dodecene acetate is made according to different combinations and ratios, and the slow-release carrier materials include rubber stoppers, polyethylene slow-release bags, polyvinyl chloride slow-release bags, polyvinyl chloride tubes, etc. The supporting trapping device is composed of a trap and a support rod, and the trap is composed of three parts: a transparent insect collector, an opaque insect guide and a cover; when using a sex attractant and a matching trap, first assemble the three parts of the trap, Put the attractant lure into the lure installation assembly on the trap cover, fix the trap on the support rod, adjust the height of the trap according to the height of the crop to ensure that the bottom of the trap is always higher than the top of the crop, and carry out grassland greed. Trapping monitoring and control of noctuid moths.

Description

Sexual attractant for Spodoptera frugiperda and supporting trapping device and usage method

technical field

The invention relates to the field of plant protection, in particular to the design and use method of a sexual attractant lure core capable of trapping Spodoptera frugiperda and a matching trap.

Background technique

Spodoptera frugiperda (J.E.Smith), an insect of the genus Spodoptera frugiperda in the family Noctuidae of the order Lepidoptera. It is a major migratory agricultural pest native to tropical and subtropical regions of America. It is polyphagous, but it has a clear preference for grasses. The most common damage to weeds, corn, rice, sorghum, sugar cane and other crops; in January 2019, fall armyworm invaded Pu'er City, Yunnan Province, my country. As of mid-August, it has harmed corn in more than 20 provinces, municipalities and autonomous regions in my country . According to reports, the insect invaded Africa in 2017 and caused a loss of 21% to 53% of the local corn yield. It is a very harmful pest.

The insect attractant lure core is composed of insect sex pheromone and the slow-release carrier of the encapsulated sex pheromone. Insect sex pheromone is a trace chemical substance secreted by the gonads of female adults that can attract male adults of the same insect. The sex pheromones of different species of insects are quite different. Through the analysis and identification of the components of the sex pheromones of the research object, chemical synthesis is carried out in specific steps to obtain the chemical substances that have the effect of attracting male adults; the sex pheromones slow down The release carrier, made of specific materials, is the part loaded with insect pheromones. The slow-release carrier ensures the slow and uniform release of internal pheromones and regulates the average daily release of pheromones.

Insect traps are used in conjunction with insect pheromone lures. According to the biological learning and flight behavior of insects, they use specific shapes or special materials to accommodate the trapping and adhesion of individual insects attracted by pheromones. Due to the differences in the biological characteristics of insects, in order to better trap specific insects, traps are used in different ways, including: hanging height, hanging density, lure core hanging position, etc.

Combining sex pheromone lures with supporting traps to monitor and control pests is an important control measure in green prevention and control. This method can not only effectively monitor the occurrence of insects, control the density of insect populations in the field, but also has a good Environmental compatibility can greatly reduce the impact of conventional chemical pesticides on the environment.

In terms of sex pheromones, domestic research on sex pheromones of fall armyworm is still in a blank stage, and there is a lack of mature pheromone products that can effectively trap fall armyworm. There is no experimental data support for the trapping effect of the insect. In terms of the method of use, the height of the trap suspension and the method of hanging the lure core are all lack of use indicators, which affect the insect trap effect.

The invention provides a sexual attractant for Spodoptera frugiperda, a matching trapping device, and a matching method for using the two in the field, so as to provide effective support for the monitoring and control of Spodoptera frugiperda in my country.

Contents of the invention

The object of the present invention is to provide a sexual attractant for fall armyworm, a matching trapping device and a field use method for the combination of the two, for monitoring and preventing fall armyworm, and reducing the harm of fall armyworm .

The first aspect of the present invention provides a sexual attractant and supporting trapping device for Spodoptera frugiperda, which is achieved through the following technical solutions:

A sexual attractant for fall armyworm and a matching trapping device, comprising a sex attractant for fall armyworm and a matching trapping device;

Wherein, the fall armyworm sex attractant refers to the fall armyworm sex attractant lure core, which consists of fall armyworm sex pheromone and a slow-release carrier;

Further, the sex pheromones of Spodoptera frugiperda include cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis-7-dodecene acetate, One or more components in cis-9-dodecene acetate, each component can form a variety of formulations, and each formulation can be used as an attractant for sex pheromone of fall armyworm;

Further, cis-9-tetradecyl acetate is formulated as a one-component sex attractant;

Further, the formula contains two components: cis-9-tetradecene acetate and cis-7-dodecene acetate;

Preferably, the two components are mixed according to a mass ratio of 90-100:0-10, which is a combination of a better sex pheromone attractant for Spodoptera frugiperda;

Further, the formula contains three components: cis-9-tetradecene acetate, cis-11-hexadecene acetate, and cis-7-dodecene acetate;

Preferably, the three components are mixed according to a mass ratio of 70-80:20-30:1-10, which is a better combination of sex pheromone attractants for Spodoptera frugiperda;

Further, the formula contains four components: cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis-7-dodecene acetate , cis 9-dodecene acetate;

Preferably, the four components are mixed according to a mass ratio of 70-80:20-30:1-5:1-5, which is a combination of better sex pheromone attractants of Spodoptera frugiperda;

Further, the slow-release carrier includes rubber stoppers, polyethylene slow-release bags, polyvinyl chloride slow-release bags, polyvinyl chloride tubes and other slow-release materials, any of which can constitute a slow-release carrier separately or in combination;

Preferably, the polyethylene slow-release bag has a thickness of 0.1 mm to 0.2 mm; the polyvinyl chloride slow-release bag has a thickness of 0.2 mm to 0.3 mm; the polyvinyl chloride tube has a length of 80 ± 5 mm, an outer diameter of 1.8 ± 0.2 mm, and an inner diameter of 0.6±0.1mm;

Further, the matching trapping device is composed of a trap and a support rod;

Further, the trap consists of three parts: a transparent insect collector, an opaque insect guide and a cover;

Further, the transparent insect collector is located under the entire trap, and the opaque insect guide is located in the middle of the trap, wherein the transparent insect collector and the opaque insect guide are closely connected without gaps after installation; the blocking cover is located above the trap , there is a certain space between the cover and the insect guide for the pests lured by the sex pheromone to enter the insect collector; the three main components are connected together in a certain way;

Preferably, the transparent insect collector is barrel-shaped with an upper opening, which can be translucent or transparent, and is made of plastic, which facilitates light transmission and promotes the activities of captured Spodoptera frugiperda in the transparent and light-transmitting area, avoiding the escape of pests and facilitating investigation Calculate;

Further, the opaque insect guide has an opening in the middle, which is the passage for the pests lured by the pheromone to enter the insect collector, and is the insect inlet; and the opening is not completely open, so as to prevent the trapped pests from directly Drilled from the opening, the opaque insect guide itself also reduces the activity of pests towards the insect guide due to shading;

Preferably, the opaque insect guide can be circular, the bottom is connected to the upper opening of the barrel-shaped insect collector, and the middle part is similar to the upper part of the inverted traditional hot pot, that is, an inverted cone, with a middle opening and smooth surroundings, which is easy to attract of fall armyworms fall directly into the insect-collecting barrel of the trap;

Further, the cover is an accessory on the upper part of the trap. In the middle of the cover, there is a component that can be installed with a lure core. The component can ensure that the sex pheromone is released through it. The cover is mainly used to block sunlight to prevent the lure core of the sex attractant from being exposed to sunlight. The release is accelerated by direct sunlight; and according to the characteristics of the light-oriented activity of the fall armyworm, by blocking the light, the trapped fall armyworm can move in the transparent and light-transmitting area of the insect collector, which also has a certain rain-proof effect;

Preferably, the assembly on which the lure is installed on the cover is in the shape of a flower basket, which is convenient for the divergence of the sex pheromone smell, and the flower basket can be combined with the cover for installation;

Preferably, the maximum height of the insect collecting barrel is 133mm, and the maximum diameter is 164mm; the height of the inverted chafing dish-shaped opaque insect guide is 74mm, the main body diameter is 167mm, and the inner diameter of the opening for insects in the middle is 29mm; the total height of the cover is 47mm;

Further, the support rod is a supporting device for fixing the trap, the length of the support rod can be fixed or can be stretched, and the material of the support rod is fiber material or other degradable materials;

Preferably, the length of the support rod is between 1.5m and 2.5m.

Another aspect of the present invention provides a method for using a sex attractant for Spodoptera frugiperda and a matching trapping device, which is achieved through the following technical solutions:

A method for using a sexual attractant for fall armyworm and a matching trapping device, including using time, installation method, installation quantity, and investigation method;

Further, the use time of the described fall armyworm sex attractant and supporting trapping device should be set before the occurrence of fall armyworm adults, so as to be able to monitor the occurrence time of fall armyworm in advance;

Further, the installation method of the described Spodoptera frugiperda sex attractant and the matching trapping device should first connect the transparent insect collector, the opaque insect guide and the cover to form the trap, the transparent insect collector is at the bottom, and the opaque guide The insect trap is in the middle, the cover is on the top, the lure of the fall armyworm sex attractant is placed in the installation assembly on the cover, and then the trap is installed on the support rod;

Further, the height of the support rod can be adjusted according to the growth height of the crops, and the height of the trap on the support rod can be adjusted to keep the bottom of the trap higher than the top of the crop;

Further, the lure core of the fall armyworm sexual attractant is regularly replaced according to the duration of the lure core, and the trap is first removed from the support rod and then the lure core is replaced;

Further, the installation quantity of the fall armyworm sexual attractant and the supporting trapping device is determined according to the purpose of using the fall armyworm sexual attractant and the supporting trapping device and the insect population density, and the installation quantity is kept at 0.2-5 per mu of land. between sets;

Further, the investigation method of the described fall armyworm sex attractant and supporting trapping device is to identify and count the pest species and count through a transparent insect trap under monitoring conditions, and then use a bag to cover the insect trap to pour out the fall armyworm. , Empty the insect trap and prepare for the next investigation, and investigate once every certain same time; when conducting a lure comparison test, it is necessary to exchange the positions of different traps in a certain direction.

Compared with prior art, technical effect of the present invention is:

1. The sex-attractant of fall armyworm provided by the present invention and the supporting trapping device are fully combined with the behavioral habit design of fall armyworm, and by placing the fall armyworm sex attractant in the installation assembly on the retaining cover of the trap, The sex pheromone that it releases lures the fall armyworm that just passes through the space between the cover and the opaque insect guide, and is guided by the opaque insect guide to enter the transparent insect collector through the incomplete opening in the middle. Because the fall armyworm flies towards the light, the cover and the opaque insect guide just block the light, and combined with the incomplete opening of the opaque insect guide, the fall armyworm is trapped in the trap, and the protection of the fall armyworm is realized. Effective trapping.

Two, the fall armyworm sex attractant and supporting trapping device provided by the present invention, on the basis of other pest attractant traps in the past, are equipped with special support rods, which can ensure that the fall armyworm sex attractant and supporting trapping device The height that changes with crop growth is highly adjusted, which promotes efficient trapping of fall armyworm and adds convenience to field use.

Three, Spodoptera frugiperda is a major invasive pest newly invaded in my country, and there is no special sexual attractant and supporting attractant products. The present invention provides effective Spodoptera frugiperda sexual attractant and Complementary trapping devices and effective field application methods.

Description of drawings

Fig. 1 schematic diagram of sex attractant for Spodoptera frugiperda and supporting trapping device;

Fall armyworm sex attractant and supporting trapping device linear diagram (combination) under Fig. 2 optimal condition;

Fall armyworm sex attractant and supporting trapping device linear diagram (separate) under Fig. 3 optimal condition;

Figure 4 is a schematic diagram of embodiment 1.

Among them, 1. Transparent insect collector; 2. Opaque insect guide; 3. Cover; 4. Lure core installation component; 5. Support rod;

Detailed ways

The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Example 1: Monitoring of Spodoptera frugiperda in Huadu District, Guangzhou, Guangdong

1. The formula of the sex attractant of Spodoptera frugiperda: cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis-7-dodecene acetate according to three groups Proportionally configured to obtain Spodoptera frugiperda sex attractant 1, cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis-7-dodecene acetate, cis -9-dodecene acetate is configured according to the four-component scheme to obtain the fall armyworm sex attractant 2, and makes the fall armyworm sex attractant lure core; the carrier used is a polyvinyl chloride tube;

2. Install the trapping device: the trap is preferably composed of a transparent insect collecting bucket, an opaque inverted hot pot-shaped insect guide and a cover. Combine the insect collecting bucket with the insect guide, combine the insect guide with the cover, and put the lure Put into the basket-shaped component in the middle of the cover, fix the trap on the support rod, and the trap installation is completed (see accompanying drawing 3, accompanying drawing 2);

3. The setting of the trapping device: insert the support rod of the already installed supporting trapping device into the field at the corn seedling stage, the height of the support rod is 2.2m, and the trap is set at a distance of 0.8m from the ground; Elevate and move the trap to the position of the support rod 1.2m; then when the corn is fast maturing, adjust the height of the trap to 1.6m on the support rod; keep the bottom of the trap 20cm from the top of the corn during the whole corn growth period (see Accompanying drawing 4);

4. Traps setting density: the hanging density is 1 per mu, and the distance between traps is greater than or equal to 12.5m.

Example 2 Trapping test of Spodoptera frugiperda in Weishan County, Dali Prefecture, Yunnan

1. The formula of the sex attractant of Spodoptera frugiperda: Component 1: cis-9-tetradecene acetate is configured as a single component; Component 2: cis-9-tetradecene acetate, cis -7-Dodecene acetate is configured according to the ratio of two components; Component 3, Component 4: cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis -7-Dodecene acetate is configured according to the ratio of three components, and the ratio of reagents is adjusted to obtain two sex attractants; component 5 and component 6: cis-9-tetradecene acetate, cis-11 -Hexadecene acetate, cis-7-dodecene acetate and cis-9-dodecene acetate are configured according to the ratio of four components, and the ratio of reagents is adjusted to obtain two kinds of sex attractants. Using polyvinyl chloride as a carrier, a total of 6 kinds of fall armyworm sexual attractant lures were made, and the components 1-6 were respectively numbered as reagent 1, reagent 2, reagent 3, reagent 4, reagent 5 and reagent 6;

2. Install the trapping device: the trap is preferably composed of a transparent insect collecting bucket, an opaque inverted hot pot-shaped insect guide and a cover. Combine the insect collecting bucket with the insect guide, combine the insect guide with the cover, and put the lure Put the basket-shaped assembly in the middle of the cover, fix the trap to the support rod, and the trap installation is completed (see accompanying drawing 3 and accompanying drawing 2), and the supporting rod is 2.2m in length;

3. Arrangement of the trap: Put the lure core of the fall armyworm sexual attractant into the lure installation assembly, insert the matching trap device with the lure core into the corn field, and keep the bottom of the trap 20cm from the top of the corn:

4. Density of traps: The hanging density is 1 per mu, and the distance between traps is greater than or equal to 12.5m. In this example, each lure core is counted as one treatment, and there are 6 groups of treatments in total, and each group of treatments is repeated 3 times.

The test started on May 30, 2019, and the results of the two-week test are shown in Table 1 below. From Table 1, it can be seen that several different formulas and different ratios of the sex-attractants of fall armyworm involved in the present invention can all attract fall armyworm For male adults, there are certain differences in the effect of trapping Spodoptera frugiperda with different lures. In production and application, select the formula with suitable effect according to different purposes:

Table 1 Statistical table of the amount of insect lures for Spodoptera frugiperda

The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make many modifications and changes according to the concept of the present invention without creative work, such as the combination or adjustment of various pheromones; such as non-functional modification of similar structures. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art shall be within the scope of protection defined by the claims.

Claims (8)

1. A fall armyworm sex attractant and supporting trapping device and using method, it is characterized in that, comprise a kind of fall armyworm sex attractant, supporting trapping device, and specially combine the behavior habit of fall armyworm, grassland trapping The use method set by the sex attractant of noctuid moth and the matching trapping device; Wherein the sex pheromone sex attractant refers to the sex attractant lure core, including sex pheromone and slow-release carrier of fall armyworm, the main component of the sex pheromone includes cis-9-tetradecyl acetate, One or more of cis-11-hexadecene acetate, cis-7-dodecene acetate and cis-9-dodecene acetate. 2. a kind of fall armyworm sex pheromone and components thereof according to claim 1, characterized in that each component can form a variety of fall armyworm sex attractants, which are respectively: by cis-9-ten Tetradecyl acetate is made into a one-component sex attractant; from cis-9-tetradecene acetate, cis-7-dodecene acetate according to the quality of 90～100:0～10 Ratio mixed to form a two-component sex attractant; from cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis-7-dodecene acetate according to 70 ~80: 20 ~ 30: 1 ~ 10 mass ratio made into a three-component attractant; cis-9-tetradecene acetate, cis-11-hexadecene acetate, cis-7 - Dodecene acetate, cis-9-dodecene acetate is formulated into a four-component sex attractant according to the mass ratio of 70-80:20-30:1-5:1-5. 3. the slow-release carrier of a kind of fall armyworm sex attractant according to claim 1, is characterized in that can slow-release carrier by rubber stopper, polyethylene slow-release bag, polyvinyl chloride slow-release bag, polyvinyl chloride pipe etc. Any one of the release materials separately or jointly constitutes the slow-release carrier. 4. The matching trapping device according to claim 1, characterized in that, it consists of a trap and a support rod; The trap is composed of three parts: transparent insect collector, opaque insect guide and cover, the transparent insect collector is located under the whole trap, the opaque insect guide is located in the middle of the trap, and the cover is located above the trap. There is a certain space in the middle of the insect trap for the pests lured by the sex pheromone to enter the insect trap, and the three main components are connected together in a certain way; the transparent insect trap is preferably barrel-shaped. 5. According to claim 4, there is a non-fully open opening in the middle of the opaque insect guide for pests to enter the insect trap, which is the insect inlet; Among them, the color of the opaque insect guide is given priority to yellow; in order to match the barrel-shaped transparent insect trap, the opaque insect guide can be round, the bottom is closely connected with the upper opening of the barrel-shaped insect trap, and the middle part is not completely open. The opening of the pot is similar to the shape of the upper part of the inverted traditional hot pot, that is, an inverted cone with an opening in the middle and smooth sides. 6. The cover according to claim 4 is an accessory for trapping the upper part, and there is a component in which a sex attractant lure core can be installed in the middle, the component can ensure the release of the sex attractant pheromone placed therein, and the component can be connected with the cover Separate and combined installation; Among them, the assembly of the attractant lure core is preferably in the shape of a flower basket, which is convenient for the divergence of the pheromone smell. 7. The support rod according to claim 4, characterized in that its length can be fixed or adjusted, and the length of the support rod is preferably between 1.5m-2.5m. 8. the cooperating method of use of the sex-attractant of fall armyworm and the supporting trapping device according to claim 1, is characterized in that, for the installation of the sex-attractant of fall armyworm and the matching trapping device, the transparent insect collector should be placed first. , the opaque insect guide and the cover are connected together to form a trap, the transparent insect collector is on the bottom, and the cover is on the top, the lure of the fall armyworm sex attractant is placed in the installation assembly on the cover, and then the trap mounted on a support pole; Among them, the use time is before the occurrence of Spodoptera frugiperda adults, and the installation quantity is kept between 0.2-5 sets per mu of land; the height of the trap on the support rod is kept at the bottom of the trap always higher than the top of the crop plant.