Dithiocyano-methane/organophosphorus pesticide composition

A technology of dithiocyanomethane and a composition is applied in the field of plant protection to achieve the effect of obvious activity and synergistic activity

Active Publication Date: 2013-02-20
HAINAN ZHENGYE ZHONGNONG HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Among the existing nematicides, fenamifos, fenamifos, carbofuran, isofenphos-methyl, thifamifos, and chymecarb are highly toxic nematicides, and dibromochloropropane i

Method used

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  • Dithiocyano-methane/organophosphorus pesticide composition
  • Dithiocyano-methane/organophosphorus pesticide composition
  • Dithiocyano-methane/organophosphorus pesticide composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dithiocyanomethane single agent, thiazophos single agent, chlorazophos single agent, chlorpyrifos single agent, phoxim single agent, profenofos single agent and the composition with certain mass ratio are diluted to certain different concentrations. Drop the quantitative diluent containing root-knot nematode of cucumber onto the glass slide, and perform microscopic examination and counting; use the same method to microscopically examine the dilution of root-knot nematode mixed with quantitative agents, perform microscopic examination and count, and measure the lethal concentration LC of each test agent respectively. 50 , Calculate the co-toxicity coefficient (CTC value) of the composition according to Sun Yunpei's method. If the CTC value is greater than 120, it is a synergistic effect. The specific method is as follows.

[0016] Set a single dose (A) as the standard single dose, specify its toxicity index (TI) as 100, then:

[0017]

[0018]

[0019] Theoretical ...

Embodiment 2

[0026] The control effect of embodiment 2 composition to crop nematode

[0027] Use sterilized soil and sterilized river sand to mix into culture soil, mix it with nematocide composition or a single agent, mix well, add water to make the water content 40%, put it into a pot, and transplant tomato plants with 30d growth In the pots, 10 days after transplanting, 500 2nd instar larvae of Meloidogyne incognita were inserted into each pot, placed in the greenhouse, and managed with quantitative watering. Three repetitions were set for each treatment, and the treatment not mixed with the drug was set as the blank control. After 20 days, when there are a large number of root knots in the rhizosphere of the blank control plants, the investigation records the number of root knots per plant, and grades according to Liu Weizhi (1995): level 0, no root knots; level 1, 1-2 root knots; level 2 , 3-10 knots; level 3, 11-30 knots; level 4, 31-100 knots; level 5, more than 100 knots. The res...

Embodiment 3

[0032] Effect of embodiment 3 composition seed dressing on cotton diseases and insect pests

[0033] Weigh the composition of dithiocyanomethane, thiazophos, chlorazofos, chlorpyrifos, phoxim, and profenofos according to the drug ratio of 200:1 (mass ratio of seeds to preparations), and drop quantitative water to dilute Afterwards, evenly mix the cotton seeds for 30min, sow in the ridges of the raw test site, and set up a blank control in addition, observe the occurrence of aphids in the cotton seedling stage after sowing, and regularly count the average number of root knots of cotton plants at random for each process, and according to Example 2 Classify the disease. The results are shown in Table 3.

[0034] Table 3 Effect of composition seed dressing on cotton seedling aphids and root-knot nematodes

[0035]

[0036]

[0037] See Table 3 for the effect of the composition seed dressing of dithiocyanomethane and several organophosphorus on cotton diseases and insect pe...

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Abstract

The invention relates to a dithiocyano-methane/organophosphorus pesticide composition. The organophosphorus pesticide is one of thiazolyl phosphine, chlorazol phosphorus, chlorpyrifos, phoxim and profenofos. The mass ratio of the dithiocyano-methane to organophosphorus pesticide is (0.1-40):1, and the sum of the dithiocyano-methane and organophosphorus pesticide accounts for 1-60 wt% of the composition. The application method of the composition in preventing and treating pests and diseases is characterized in that the composition is applied on crops, or in soil, or in a seed dressing mode.

Description

technical field [0001] The invention belongs to the field of plant protection, in particular to the composition of dithiocyanomethane and organophosphorus insecticidal components and its application in controlling nematodes and pests. Background technique [0002] Plant parasitic nematodes are one of the invasive pathogens of plants, and they are widely parasitic on the roots, stems, leaves, flowers, buds and seeds of various plants. Globally, the occurrence and damage of plant parasitic nematodes are becoming more and more serious with the change of farming system. At present, there are more than 3,000 kinds of nematodes that are harmful to plants. At present, more than 40 kinds have been found in my country. Common ones such as root-knot nematodes, cyst nematodes, pine wood nematodes, and sweet potato stem nematodes are important agricultural pathogenic nematodes. Cyst nematodes and cyst nematodes are the most harmful, and the main harmful crops are cucumber, peanut, rice,...

Claims

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Application Information

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IPC IPC(8): A01N57/32A01N57/16A01N57/14A01N47/48A01P5/00
Inventor 侯华民张善学陈坚陈泰龙陈其确王少龙
Owner HAINAN ZHENGYE ZHONGNONG HIGH TECH
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