CN1429485A - Rice seed coating agent for preventing insect damage - Google Patents

Abstract

A rice seed coating agent for pests, with fipronil and imidacloprid as main active ingredients. Seed coating agent containing 0.3-1.3g of fipronil active ingredient and 0-0.5g of imidacloprid active ingredient per kilogram of rice seed coating can effectively control rice stem borer, rice stem borer, rice thrips, brown planthopper and aphids, etc. A variety of rice pests and rice stripe leaf blight transmitted by striatellus striatellus can last for more than 35 days, and can control insect pests in the rice seedling field stage and early field stage, and can control borer damage during the entire rice growth period when applied on a large scale. Compared with the traditional spraying method to control rice pests, this coating technology has the advantages of high efficiency, safety and convenience. After a large number of applications, it will produce significant economic, social and ecological benefits.

Description

Rice seed coating agent for controlling pests

The invention belongs to a seed coating agent for preventing and controlling harmful organisms by using seed coating.

For a long time, the control of rice pests has been chemically controlled by spraying. On the one hand, the traditional spraying method makes it difficult to grasp the appropriate period of control due to the complexity of the occurrence of pests, which often leads to unsatisfactory control effects, and at the same time consumes time and labor; directly affect the health of workers. In recent years, rice borers have become the first threat to rice production in my country, causing millions of tons of rice loss every year. Due to the large number of borer occurrences and many peaks, the existing control measures are frequent spraying of pesticides. Excessive frequent spraying of pesticides not only makes producers tired, but also weakens their enthusiasm for growing grain, and some producers even voluntarily give up. Prevention and control will further lead to an increase in the number of pests, forming a vicious circle to some extent. Moreover, excessive spraying of chemical pesticides, especially in the later stages of rice growth, will increase the pesticide residues in rice, making it impossible to achieve "green rice" production. For this reason, it has become a top priority to break through the traditional methods of moth control and find new efficient and safe control measures.

Seed coating agent is a medicament for dressing and coating seeds. It is a composite product processed by advanced technology from active ingredients such as insecticides, fungicides, and trace elements, and auxiliary ingredients such as slow-release agents and film-forming agents. Seed coating is concealed and concentrated, with strong targeting, which minimizes pesticide pollution and realizes the simultaneous growth of economic, social and ecological benefits. Seed coating technology is widely used abroad, and almost all seeds must be coated. However, it was not until 1996 that the Ministry of Agriculture proposed to implement the "Seed Project" in my country that the seed coating technology developed rapidly. In 1991, the seed coating was only more than 10 million mu, and by 1999 it had reached more than 400 million mu. Among them, rice is 22.92 million mu, which is only a small proportion compared to the total rice planting area of 350 million mu, but it has increased by 37% compared to 1998. From this point of view, there is a huge room for the development of rice seed coating agents. At present, several varieties of rice seed coating agents have been popularized and applied in the market, but they are mainly used for sterilization and fertilization, and they also control underground pests in the rice seedling stage. Thrips, SBPH and the rice stripe blight transmitted by them have no control effect.

The present invention has developed a compound rice seed coating agent through systematic indoor measurement and field tests, and utilizes the advantages of each agent component to compound them into a rice seed coating agent, which is suitable for treating rice stem borers, rice thrips, rice fly Prevention and control of various pests such as lice and aphids and stripe leaf blight transmitted by SBPH.

Rice seed coating agent of the present invention, with fipronil (chemical name: 1-(6-chloropyridin-3-pyridylmethyl)-N-nitroimidazolidin-2-ylamine) and imidacloprid (chemical Name: (RS)-5-amino-1-(2,6-dichloro-4α-trifluoromethylphenyl)-4-trifluoromethylsulfonylpyrazole-3-carbonitrile) as the main active ingredient, Among them, fipronil accounts for 70%-100% of the active ingredients, imidacloprid accounts for 0-30%, and then adds suitable auxiliary ingredients such as film-forming agents, and is prepared according to the seed coating agent processing procedure.

The rice seed coating agent of the invention is mixed in after the rice seeds are soaked for 12-24 hours, can form a uniform coating on the surface of the rice seeds, has no adverse effect on the germination rate of the rice, and can improve the quality of the seedlings.

The rice seed coating agent of the present invention, 2-year multi-point field test shows that the duration of the pest control of rice seedling field stage is more than 35 days. The rice seed coating agent containing 0.3-1.3g of fipronil active ingredient and 0-0.5g of imidacloprid active ingredient per kilogram of japonica or hybrid rice seeds can effectively control the occurrence of rice borers, rice thrips, aphids and SBPH, Prevent the spread of striped leaf blight. The rice seed coating agent is not only convenient to apply, but also has outstanding effect. For the monophagous pest Chiloborea and the oligophagous pest Chiloborer, which use rice as the only food, one seed coating can solve the pest control for the entire rice growing season. More importantly, due to the concealed concentration of pesticide application, the damage to beneficial organisms in the paddy field is reduced, so the ecological, economic and social benefits are very significant.

Embodiment 1 made by the inventor in the invention:

The preliminary screening done by the inventor in the experimental field of Jiangsu Academy of Agricultural Sciences compared the utilization of fipronil (0.3～1.3 gram active ingredient/kg seed), fipronil and imidacloprid (0.3～1.3 gram+0.5 gram active ingredient/ kg of seeds), triazophos and imidacloprid (8.0 g+0.5 g active ingredient/kg seed), chlorchamp and imidacloprid (3.0 g+0.5 g active ingredient/kg seed) coated rice seeds have a The control effect of borer, thrips, aphids and brown planthopper. The result is as follows:

Table 1 The control effect of seed coating agents on rice stem borer and rice stem borer

Treatment 15 days after medication 25 days after medication 35 days after medication

Sanhua 螟 螟 螟 螟 螟 螟 螟 螟 螟 螟 螟 螟 腈 100.0 100.0 100.0 100.0 100.0 Fluorine 腈+pimplerine 100.0 100.0 100.0 100.0 100.0 trifle 52.0 58.0 20.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 Chongdan + imidacloprid 0.0 0.0 0.0 0.0 0.0 0.0

Control effect of table 2 seed coatings on rice thrips and aphids

Treatment 15 days after medication 25 days after medication 35 days after medication

Grassy trips aphids, threaded aphids, fryston aphiflora fluorine 腈 100.0 100.0 100.0 100.0 100.0 fluorine 腈+imidacloprid 100.0 100.0 100.0 100.0 100.0 pyrodoline 41.0 35.2 24.0 22.0 pesticide+pest Denm 40.0 32.0 17.0 19.8

The control effect of table 3 kinds of coating agents to SBPH

Treatment 15 days after medication 25 days after medication 35 days after medication

Fipronil 85.0 86.5 82.2

Fipronil+Imidacloprid 90.8 89.2 85.5

Triazophos + imidacloprid 35.5 34.0 24.8

Dichendan + imidacloprid 37.2 32.5 21.8

Embodiment 2 made by the inventor in the invention:

The inventor has carried out field test in Gaochun County, Jiangsu Province. Using fipronil and imidacloprid to coat japonica rice seeds has the following control effects on rice stem borer, rice stem borer, SBPH and stripe leaf blight transmitted by SBPH:

Table 4 The field effect of 5% rice seed coating agent on the control of the first generation of three stem borers and two stem borers per kilogram of seeds Control effect of dry heart 20 days after treatment Control effect of dry heart 35 days after treatment Insecticidal effect of 35 days after treatment Dosage (g ) Stem borer Stem borer Stem borer Stem borer

6 58.2 58.8 59.0 57.2 62.9 60.5

10 90.4 93.2 90.5 87.3 91.9 90.7

14 100.0 100.0 100.0 100.0 100.0 100.0

Table 5 The field effect of 5% rice seed coating agent on the control of SBPH and stripe leaf blight

6 53.4 51.6 42.2

10 77.6 75.0 59.0

14 91.5 90.0 70.5

Embodiment 3 that the inventor made in the invention:

Inventor has carried out field experiment in Anhui province and county. Using fipronil and imidacloprid to coat hybrid rice seeds has the following control effects on rice stem borer, rice stem borer, brown planthopper and stripe leaf blight:

Table 6 The field effect of 5% rice seed coating agent on the control of the first generation of rice stem borer and rice stem borer per kilogram of seeds Control effect of dead heart 20 days after spraying Control effect of dead heart 35 days after spraying Insecticidal effect 35 days after spraying Dosage (g ) Stem borer Stem borer Stem borer Stem borer

10 60.7 54.0 58.2 57.4 62.5 58.7

15 91.0 90.6 90.4 90.6 91.4 91.1

20 100.0 100.0 100.0 100.0 100.0 100.0

Table 7 The field effect of 5% rice seed coating agent on the control of SBPH and stripe leaf blight

10 54.8 53.5 38.5

15 81.0 79.5 49.0

20 87.8 85.2 72.5

Claims (2)

1, a kind of dressing agent for rice of pest control is characterized in that with fluorine worm nitrile and Imidacloprid be main active ingredient, and wherein to account for the active ingredient ratio be 70～100% to fluorine worm nitrile, and Imidacloprid is 0～30%.

2, according to the described dressing agent for rice of claim 1, it is characterized in that every kilogram of japonica rice or the fluorine-containing worm nitrile of hybrid rice seed dressing active ingredient are that 0.3～1.3 gram and Imidacloprid active ingredient are the kind clothing agent of 0～0.5 gram, can effectively prevent and treat the stripe disease that the snout moth's larva of rice, rice thrips, aphid, plant hopper and small brown rice planthopper are propagated.