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Sterilizing composition

A composition and technology for crop diseases, applied in the directions of fungicides, biocides, biocides, etc., can solve the problems of increased drug dosage and decreased drug efficacy, reduce production and use costs, overcome disease resistance, and reduce field effect of dosage

Active Publication Date: 2010-02-17
DONGGUAN RUIDEFENG BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to frequent medication, its efficacy decreases and the dosage increases

Method used

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  • Sterilizing composition

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Biological Assay Example 1: Cyazofamid and Dimethomorph Compound Toxicity Determination of Cucumber Downy Mildew

[0019] Test object: Cucumber downy mildew pathogen

[0020] The potted method was used in this experiment. Use a brush to wash distilled water at about 10°C and wash the sporangia on the back of cucumber leaves with downy mildew bacteria from the field, and make 3×10 5 sporangia / mL suspension. Select two cucumber seedlings at the true leaf stage with the same growth, and select 5 pots of melon seedlings for each treatment, and spray them with a Potter spray tower at a pressure of 50PSI, about 5mL per pot. Five concentration gradients were set for each agent, and the same amount of water sprayed was used as the blank control. Spray and inoculate cucumber downy mildew bacteria 24 hours after the chemical treatment. After the inoculation, place the cucumber seedlings in an artificial climate box (relative humidity 100%, temperature 15-20°C) for cultivation,...

example 2

[0040] Bioassay example 2: Toxicity determination of Cyazofamid and dimethomorph compounded against tomato late blight

[0041] Test object: Tomato late blight pathogen

[0042] The potted method was used in the experiment. The test crop is late blight-susceptible tomato, which is cultivated in pots to the stage of 2-4 true leaves and numbered for future use. Cultivate the pathogenic bacteria used in the test on a suitable medium. After the sporangia are produced, wash the sporangia with sterile water and filter them with double-layer gauze to make 1×10 5 sporangia / mL sporangia suspension. According to the activity of the medicine, set 5-7 series of mass concentrations according to the activity of the medicine. Spray the liquid medicine evenly on the leaf surface until it is completely moistened, and wait for the liquid medicine to dry naturally for later use. For each treatment, 3 pots were repeated 4 times, and the treatment containing only solvent and surfactant but no ...

Embodiment 1

[0056] Embodiment 1: 10.2% Cyazofamido Dimethomorph Suspending Concentrate

[0057] Cyazofamida 10%

[0058] Dimethomorph 0.2%

[0059] Sodium methylnaphthalene sulfonate formaldehyde condensate (wetting and dispersing agent) 10%

[0060] Xanthan gum (thickener) 1%

[0061] Bentonite (carrier) 1%

[0062] Glycerol (antifreeze) 1%

[0063] Water Make up to 100%.

[0064] Mix the active ingredient, wetting and dispersing agent, thickener, carrier, water and other components uniformly according to the proportion of the formula, and after grinding and / or high-speed shearing, 10.2% Cyazofamido dimethomorph suspension concentrate is obtained .

[0065] This embodiment is applied to the control of cucumber downy mildew. Dilute and spray 10.2% Cyazofamid Dimethomorph Suspension Concentrate 2000 times (the effective concentration of Cyazofamid is 50 μg / ml, and the effective concentration of Dimethomorph is 1 μg / ml) with water. The control effects were 90.8% and 89.2% respective...

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Abstract

The invention relates to a sterilizing composition which comprises the active ingredients of cyazofamid (A) and dimethomorph (B), and the mass ratio of A to B is 50:1-1:50. After the cyazofamid and the dimethomorph are compounded, the sterilizing composition has a marked synergistic function, and is used for the disease control of crops including fruit trees, flowers, cotton, wheat, rice, rapes, vegetables and the like, in particular for the control of oomycete diseases.

Description

technical field [0001] The invention relates to a bactericidal composition, in particular to a bactericidal composition containing cyafamid and dimethomorph. Background technique [0002] In recent years, many diseases have become resistant to pesticides due to single and unscientific drug use, which has become a major problem in chemical control. At the same time, frequent application of pesticides has caused increased burden on farmers and increased environmental pollution. Therefore, there is an urgent need for new varieties of fungicides with high efficiency, low toxicity and environmental protection. [0003] Oomycete disease is a very important disease of crops, often causing significant losses of crops, such as cucumber downy mildew and tomato late blight. Cucumber downy mildew is a common dangerous disease in cucumber cultivation. It has the characteristics of fast transmission, short incubation period, ferocious onset, and serious damage. The resistance to dimetho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/84A01N43/50A01P1/00A01P3/00
Inventor 张洪张承来曹明章刘胜召文伯健王艳武孔建
Owner DONGGUAN RUIDEFENG BIO TECH
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