Farmers who often deal with pesticides sometimes encounter pesticide failures. What are the factors related to the efficacy of pesticides? How to deal with pesticides once they fail? Let's follow them with Xiaobian.
Objective reasons
Environmental factors such as temperature, humidity, rain, light, wind, and soil properties directly affect the physiological activities of pests and diseases and the performance of pesticides, and the results will affect the efficacy of pesticides.
1. The same dosage of herbicides acetochlor, trifluralin, laso, and dur, the herbicidal effect is poor during drought, and the herbicidal effect is high under suitable soil moisture conditions; the effect is significantly higher than that on sand land. Used in places with high organic matter content.
2, phoxim see light easily decomposed and failed. Therefore, before using pesticides, it is necessary to master its performance characteristics, biological characteristics of the control object; in the application process, make full use of all favorable factors to control adverse factors, in order to achieve the best control effect.
personal reasons
The chemical composition, physical and chemical properties, mechanism of action, dosage and processing properties of pesticides directly or indirectly affect the efficacy.
1. Fast-killing and killing is effective against many lepidopteran pests, but it is not effective against alfalfa; the effect of controlling lepidopteran pests with 20 ml and 40 ml per mu will be quite different.
2. According to the control object, crop type and use period, choose the appropriate pesticide variety, dosage form and dosage.
Different objects
The living habits of different pests and diseases are different. Even if the same disease or pest, the response to different pesticides or similar pesticides is different due to different developmental stages, it often shows the difference in control effects.
1. Cover grass can be effective for most grass weeds and is not effective for broadleaf weeds.
2. Monocrotophos has a good effect on the 1st and 2nd instar larvae of Helicoverpa armigera, but it is less effective for larvae after 3rd instar.
What should I do with the failed pesticide?
powder
If the powder absorbs moisture and agglomerates during storage, it needs to be placed in a cool and ventilated place to dry. Do not use it after sun exposure or crushing. If the agglomeration is serious, it can only be used for toxic soil.
Wettable powder
1. Take 1 part of wettable powder, add 200 parts of water, hold in a glass, shake it for a certain period of time, observe the suspension. If the drug precipitates slowly, the suspension is good.
2. In case of poor quality, silicone additives or 0.10% neutral detergent should be added before use to increase the wet spread. If the wettable powder absorbs moisture and is hard, it should not be used as a spray.
Emulsifiable oil
1. Changes in the emulsifying properties of the emulsifiable concentrate. Take 1 part of emulsifiable concentrate, add 200 parts of water, put it in a glass cup, shake it and let it stand for about half an hour. Observe the emulsification. If there is no oil slick in the upper layer, there is no precipitation in the lower layer, no obvious oil beads in the middle, indicating that the emulsification performance is good; There is emulsifiable concentrate, there is sediment underneath, and there is delamination after 10 minutes, indicating that the emulsion is destroyed and cannot be used.
2, agglomeration phenomenon. If the emulsified concentrate has a non-flowing viscous liquid or has formed a soapy solid, it proves that the solvent has been mostly volatilized and the quality has changed and cannot be used.
3. Precipitation crystallization. For long-term storage of the emulsion, there will be white crystals on the bottom of the bottle or turbidity. If the emulsified milk bottle is immersed in warm water of 30-40 ° C, the crystallization will melt in about 30 minutes and return to a transparent liquid, indicating that the quality is still good and can be used. If it does not dissolve, it indicates that the quality of the cream has changed and cannot be used.
Want to know more about pesticides, please pay attention to China Pesticide Network
Specification: Material PC
LED Quantity: LEDs-16 Hanging strings(0.4-0.6m Height)
LED Color: Warm White / White / Multicolor / Blue / Purple
Cable color: Transparent
Plug wire Length includ controller: 0.8m / 2.6Ft
Voltage: AC220V/120V
Waterproof: IP44(The light is waterproof,you can use it outdoor,but the controller is not,you need to protect it)
Package includes:
1 x LED Curtain String Light
Outdoor Christmas tree/elk/jingle bells LED String lights Flashing Lights Curtain Lights Waterproof Outdoor indoor Holiday Party Connectable Wave Fairy Light
Product Description:
Outdoor Christmas tree fiber led mesh light colorful decoration waterproof cold fiber optic light net.Quick Details:
Warranty(Year):1-Year Lighting solutions service:Project Installation
Input Voltage(V):110-240 CRI (Ra>):85
Working Temperature(ºC):-40+80 Working Lifetime(Hour):60000
IP Rating:IP67 Certification:Reach, Rosh
Lamp Body Material:PMMA optic fiber Light Source:LED
Place of Origin:Jiangxi, China Brand Name:DS POF
Model Number:DS Name:1.0mm plastic optic fiber and end glow fiber optic cable
Application:Lighting Decoration Material:PMMA FIBER OTPIC
Color:RGB Fiber diameter:0.75MM, 1.0MM, 1.5MM
Packing:PP BAG/CARTON Fiber quantity:CUSTOMIZED
Length:CUSTOMIZED Model:D750-105
Attenuation:200dB/km
Led Bulb,Light Bulbs,Led Light Bulbs,Incandescent Light Bulb
Taiyaun JDS Machinery And Equipment Co., Ltd. , https://www.jdsmachine.com