CN1429485A

CN1429485A - Rice seed coating agent for preventing insect damage

Info

Publication number: CN1429485A
Application number: CN 01138074
Authority: CN
Inventors: 方继朝; 郭慧芳
Original assignee: Jiangsu Academy of Agricultural Sciences
Current assignee: Jiangsu Academy of Agricultural Sciences
Priority date: 2001-12-31
Filing date: 2001-12-31
Publication date: 2003-07-16

Abstract

A coating agent of rice seeds for preventing and eliminating pests (rich borer, aphis, hopper, rich thrips, etc.) contains fipronil and imidacloprid as its main active components. Its advantages are high acting durability (35 days or more), high effect and high safety.

Description

A kind of dressing agent for rice of pest control

The invention belongs to the kind clothing agent that utilizes seed pelleting control pest.

For a long time, the control of rice grub adopts spray-on process to carry out chemical control.Because traditional spray-on process can make because of the complexity that insect is taken place on the one hand and prevent and treat optimum period and be difficult to hold, and usually causes control efficiency not ideal enough, takes time and effort again simultaneously; Cause agricultural chemicals to fly away to bring environmental pollution, also directly influence labor author's health because of spraying on the other hand.In recent years, the snout moth's larva of rice became the first-class threat of China's Rice Production, caused the millions of tons of paddy loss every year.Radix is big because snout moth's larva is taken place, the peak is inferior many, existing prophylactico-therapeutic measures is frequent spraying pesticide, the dispenser of crossing high frequency time not only makes the producer tired in this, weakened their kind grain enthusiasm, control is abandoned in some producers even active, further cause the increasing of insect radix, form vicious circle in a way.And too much spray chemical pesticide particularly paddy rice late growth stage dispenser meeting residue of pesticide are increased, can't realize the production of " green rice ".For this reason, break through tradition and control the snout moth's larva means, seeking new highly effective and safe prophylactico-therapeutic measures has become the task of top priority.

Planting the clothing agent is the medicament of wearing the clothes and coating to seed, is the plyability product that is processed through advanced technologies by insecticide, bactericide, micro-isoreactivity composition and auxiliary agent compositions such as sustained release agent and film forming agent.The seed pelleting medication is hidden concentrates, target has reduced pesticide hazards by force, to greatest extent, has realized economic, society, ecological benefits simultaneous growth.Seed coating technology is used very extensive, nearly all seed abroad and is all wanted Cotton seeds.Yet, propose to implement " seed engineering " up to the Ministry of Agriculture in 1996 in China, seed coating technology is developed rapidly.Seed pelleting was only more than 1,000 ten thousand mu in 1991, had reached more than 400,000,000 mu to 1999.Wherein paddy rice is 2,292 ten thousand mu, with respect to 3.5 hundred million mu of the total cultivated areas of paddy rice, has also only accounted for very little ratio, but has increased by 37% with respect to 1998, and in view of this, the development space of dressing agent for rice is huge.Existing in the market several dressing agent for rice kinds are being applied, but all based on sterilization and fertilising, the double rice nursery period soil insect of harnessing the river, and invalid for the thorny snout moth's larva of rice of current control, also to nursery period other insects of paddy rice such as the no preventive and therapeutic effects such as stripe disease of thrips, small brown rice planthopper and propagation thereof.

The present invention is through the indoor measurement and the field trial of system, develop a kind of compound dressing agent for rice, utilize each medicament component intrinsic advantage, they are combined into dressing agent for rice, are applicable to the control that various pests such as the snout moth's larva of rice, rice thrips, rice fulgorid, aphid is reached the stripe virus disease of propagating by small brown rice planthopper.

Dressing agent for rice of the present invention; with fluorine worm nitrile (chemical name: 1-(6-chloropyridine-3-pyridylmethyl)-N-nitroimidazole alkane-2-base amine) and Imidacloprid (chemical name: (RS)-5-amino-1-(2; 6-two chloro-4 α-trifluoromethyl)-and 4-trifluoromethyl sulfonyl pyrazoles-3-nitrile) be main active ingredient; wherein fluorine worm nitrile accounts for active ingredient 70%～100%; Imidacloprid accounts for 0～30%; auxiliary agent compositions such as the film forming agent that is suited are again made by kind of a clothing agent procedure.

Dressing agent for rice of the present invention is admixed behind rice paddy seed seed soaking 12～24h, can form even dressing on the rice paddy seed surface, the paddy rice bud ratio is had no adverse effects, and can improve seedling quality.

Dressing agent for rice of the present invention, the multiple spot field trial in 2 years show, to lasting period of rice seedling bed phase control of insect more than 35 days.Every kilogram of japonica rice or hybrid rice seed can effectively be controlled the generation of the snout moth's larva of rice, rice thrips, aphid and small brown rice planthopper with the dressing agent for rice of fluorine-containing worm nitrile active ingredient 0.3～1.3g and Imidacloprid active ingredient 0～0.5g, prevent the propagation of stripe virus disease.It is convenient that this dressing agent for rice is not only used, and effect is outstanding.For the monophagy insect paddy stem borer and the oligophagy insect striped rice borer that with paddy rice are unique foodstuff, seed pelleting can solve the insect pest control in season of whole paddy growth.The more important thing is because the hidden of dispenser concentrated, reduce injury beneficial organism in the rice field, therefore ecological, economic and social benefit is all very remarkable.

The embodiment 1 that the inventor is done in invention:

The Preliminary screening that the inventor is done at the Jiangsu Province Agriculture Science Institute sample plot has compared respectively and has utilized fluorine worm nitrile (0.3～1.3 gram active ingredient/kilogram seed), fluorine worm nitrile and Imidacloprid (0.3～1.3 gram+0.5 gram active ingredient/kilogram seed), Hostathion and Imidacloprid (8.0 grams+0.5 gram active ingredient/kilogram seed), benthiocarb and Imidacloprid (3.0 grams+0.5 gram active ingredient/kilogram seed) the dressing rice paddy seed control efficiency to paddy stem borer, striped rice borer, thrips, aphid and small brown rice planthopper.The result is as follows:

Table a kind of clothing agent is to the control efficiency of striped rice borer and paddy stem borer

Handled behind the medicine behind 15 days medicines behind 25 days medicines 35 days

Paddy stem borer striped rice borer paddy stem borer striped rice borer paddy stem borer striped rice borer fluorine worm nitrile 100.0 100.0 100.0 100.0 100.0 100.0 fluorine worm nitrile+Imidacloprids 100.0 100.0 100.0 100.0 100.0 100.0 Hostathions+Imidacloprid 52.0 58.5 25.0 20.0 0.0 0.0 benthiocarbs+Imidacloprid 0.0 0.0 0.0 0.0 0.0 0.0

Table 2 kind of clothing agent is to the control efficiency of rice thrips and aphid

Rice thrips aphid rice thrips aphid rice thrips aphid fluorine worm nitrile 100.0 100.0 100.0 100.0 100.0 100.0 fluorine worm nitrile+Imidacloprids 100.0 100.0 100.0 100.0 100.0 100.0 Hostathions+Imidacloprid 41.0 43.5 38.0 35.2 24.0 22.0 benthiocarbs+Imidacloprid 37.0 35.8 40.0 32.0 17.0 19.8

Table 3 kind of clothing agent is to the control efficiency of small brown rice planthopper

Fluorine worm nitrile 85.0 86.5 82.2

Fluorine worm nitrile+Imidacloprid 90.8 89.2 85.5

Hostathion+Imidacloprid 35.5 34.0 24.8

Benthiocarb+Imidacloprid 37.2 32.5 21.8

The embodiment 2 that the inventor is done in invention:

The inventor has carried out field trial in the Gaochun County, Jiangsu Province.Utilize fluorine worm nitrile and Imidacloprid dressing japonica rice seed, the control efficiency of the stripe virus disease of propagating to paddy stem borer, striped rice borer and small brown rice planthopper and by small brown rice planthopper is as follows:

Table 4 5% dressing agent for rice is prevented and treated behind every kilogram of seed medicine of field effect of generation paddy stem borer and striped rice borer behind 20 days withered heart preventive effect medicines 35 days insecticidal effect dosage (g) striped rice borer paddy stem borer striped rice borer paddy stem borer striped rice borer paddy stem borers behind 35 days withered heart preventive effect medicines

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

55 days dosage (g) desinsection preventive effect insecticidal effect protection effects behind 35 days medicines behind 20 days medicines behind every kilogram of seed medicine of field effect of table 5 5% dressing agent for rice control small brown rice planthopper and stripe virus disease

6 53.4 51.6 42.2

10 77.6 75.0 59.0

14 91.5 90.0 70.5

The embodiment 3 that the inventor is done in invention:

The inventor has carried out field trial in Anhui Province and county.Utilize fluorine worm nitrile and Imidacloprid dressing hybrid rice seed, as follows to the control efficiency of paddy stem borer, striped rice borer and small brown rice planthopper and stripe virus disease:

Table 6 5% dressing agent for rice is prevented and treated behind every kilogram of seed medicine of field effect of generation paddy stem borer and striped rice borer behind 20 days withered heart preventive effect medicines 35 days insecticidal effect dosage (g) striped rice borer paddy stem borer striped rice borer paddy stem borer striped rice borer paddy stem borers behind 35 days withered heart preventive effect medicines

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

55 days dosage (g) desinsection preventive effect insecticidal effect protection effects behind 35 days medicines behind 20 days medicines behind every kilogram of seed medicine of field effect of table 7 5% dressing agent for rice control small brown rice planthopper and stripe virus disease

10 54.8 53.5 38.5

15 81.0 79.5 49.0

20 87.8 85.2 72.5

Claims

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.