Compound pesticide of fipronil and pridaphenthione

A technology of pyridazinphos and fipronil, which is applied in the field of compound pesticides of fipronil and pyridazinil, can solve the problems of poor quick-acting, limited use, and high price of fipronil pesticides, and achieve quick-acting and long-lasting effects Good, good environmental compatibility, and low preparation cost

Inactive Publication Date: 2007-10-03
徐克华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Fipronil has been widely used in the control of rice pests and migratory locusts in recent years. It has a good control effect on rice pests, such as rice gall midges, rice thrips, rice stem borers, rice planthoppers, and rice locusts. The control effect of the rice borer and the rice leaf roller is not ideal, and the control effect of the rice borer is poor. Therefore, in the rice production areas where fipronil has been used for 3 to 4 years, the population ratio of the rice borer has increased rapidly
In addition, fipronil is highly toxic to fish and shrimp, and its use in water networks and lake areas is subject to certain restrictions
At the same time, the quick-acting property of fipronil pesticide is poor and the price is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 Determination of the co-toxicity coefficient of this compound pesticide to Chilo suppressalis

[0018] The test agent is:

[0019] 80% concentration of fipronil aqueous dispersion

[0020] 20% Pyridazinthion EC

[0021] Five compound pesticides of groups A, B, C, D, and E with the total concentration of fipronil and pyridazinthion at 22.5%:

[0022] Fipronil (weight) Pyridazinphos (weight)

[0023] A 0.3% 22.2%

[0024] B 0.6% 21,9%

[0025] C 0.9% 21.6%

[0026] D 1.2% 21.3%

[0027] E 1.5% 21.0%

[0028] Test method: adopt the dipping feed method, that is, treat 20 4-5 instar larvae, set up two repetitions, and use clear water dipping as a control. Cut the rice stalks at the tillering stage without pesticide application into small sections of 4 to 5 cm long, put them into the above-prepared medicinal solution, soak for 1 minute and take them out, absorb the medicinal solution on the surface of the rice stalks with absorbent paper, and put the...

Embodiment 2

[0032] Example 2 Field control effect test on rice stem borer

[0033] The experiment was carried out in the early rice field in Pingba area, clay loam, medium fertility, gravity irrigation. The early rice variety is Zhongzu No. 4, which was transplanted on March 28. The planting size is 7 x 6 inches, with 4 to 5 plants per cluster. The application period is May 24th, and 4 groups of paddy fields with different pesticides were set up, and a group of clean water was set up as a control. The results are shown in Table 2

[0034] Table 2 shows that the dead heart rate of fipronil-pyridazinphos compound of the present invention is 0.11%, and the control effect is 98.7%, and the dry heart rate of 5% fipronil is 0.28%, and the control effect is 96.7%, 40% The dead heart rate of azithion EC was 0.51%, and the control effect was 93.9%. The control effect of 20% triazophos EC was the worst.

[0035] Among the above-mentioned medicaments, in each plot treated with the compound agent ...

Embodiment 3

[0044] Example 3 Indoor Determination of Control Effects on Rice Leaf Roller

[0045] Pharmacy Handling:

[0046] (1) 22.5% fipronil-pyridazinphos compound diluted 1000, 3000, 5000 times;

[0047] (2) 22.5% fipronil-pyridazinphos compound + 20% mineral oil, diluted 1000, 3000, 5000 times;

[0048] (3) Clear water control

[0049] Test method: use food dipping method. Cut the stems and leaves of the rice tillering stage into small pieces of 4-5 cm, put them in the liquid medicine, soak them for one minute, take them out, absorb the liquid medicine on the surface of the rice leaves with absorbent paper, put them into bowls, put each bowl in the field Collect about 10 3rd to 4th instar larvae of the rice leaf roller, check the number of larvae deaths within 24 hours, calculate the mortality rate and corrected mortality rate, and repeat twice for each treatment.

[0050] The test results are shown in Table 3 and Table 4.

[0051] Treatment concentration

[0052] ...

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PUM

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Abstract

The invention provides a compound pesticide of fipronil and pridaphenthione which comprises active ingredients and acceptable pesticide adjuvant, wherein the active ingredients include Fipronil 0.3-10%, pridaphenthione 10-40%, preferably Fipronil 1-3%, pridaphenthione 15-25%. The pesticide has good effect in controlling Chilo supperssalis, Cnaphalocrocis medinalis Guenee and Laodelphax srtiatellus.

Description

technical field [0001] The invention relates to a compound pesticide of fipronil and pyridazinphos for controlling rice pests. Background technique [0002] Rice stem borer is a major pest of rice in my country, especially in rice fields in the Yangtze River Basin. It will cause a large number of dead hearts in the tillering stage, and in addition to causing white ears in the later stage of rice growth, it will also cause a large number of insect damage to the plants, making them lodging in patches. In the control of chemical agents, currently mainly used pesticides such as monosultap, dimehypo and other nereist pesticides have developed strong resistance, and the successive use of triazophos and other pesticides has also significantly increased the resistance. At present, the pesticides with good control effects include fipronil and Meima, etc., but due to their high price and poor quick-acting properties, there are certain limitations in the use process. [0003] Fiproni...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): A01N57/16A01P7/04
Inventor徐克华林国宏胡国文
Owner徐克华