Pesticides have a certain shelf life. When crops use pesticides that exceed their shelf life, they will cause pests, grasses, and mice to become resistant to pesticides, delaying the best period of control, and even causing phytotoxicity to crops.
Several pesticide failure identification methods are introduced. Farmers' friends must avoid using expired pesticides.
Intuitive method For powder pesticides, first look at the appearance of pesticide products, if the obvious damp agglomerate, the smell is not strong or other abnormalities, and can be hand-crushed into groups, such pesticides basically fail. For EC pesticides, the vial is allowed to stand still. If the drug solution is cloudy or delaminated (ie, the oil and moisture layer), precipitates are formed, or the floc is suspended, the pesticide is ineffective.
The heating method is suitable for powder pesticides. Take 5-10g of pesticide sample and heat it on a metal piece. If there is a lot of smoke and there is a strong pungent odor, it indicates that the pesticide sample has good performance. Otherwise, it shows that it does not have active ingredients of pesticides. .
The floatation method is applicable to wettable powder pesticides. First take 200 g fresh water glass, and then weigh 1 g pesticide sample. Gently spread evenly on the surface of the water. Observe carefully. In 1 minute, it is wet and soluble in water. Invalid pesticide, otherwise it is invalid.
Oscillation method applies to EC pesticides. For the emergence of pesticides in the oil and moisture layer, shake the vial vigorously and observe after standing for 1 hour. If delamination still occurs, the pesticide has failed.
Dilution method applies to EC pesticides. Take 50 grams of pesticide sample, place it in a glass bottle, add 150 grams of water, and shake it for 30 minutes. If the liquid is homogeneous milky white, and there is no slick oil, there will be no precipitate, indicating that the pesticide is good, otherwise it is invalid. . The more oil floating in the upper layer, the worse the pesticide quality.
The suspension method is suitable for wettable powder pesticides. Take 30-50 grams of pesticide sample, place it in a glass container, add a small amount of water to make a paste, add 150-200 grams of water to mix well, and let stand for 10 minutes to observe. The pesticide without failure is good in solubility and suspended in the liquid. The fine particles are small, the sedimentation rate is slow and the amount of precipitation is small, and the failure of pesticides is the opposite.
Hot melt method is suitable for EC pesticides. Put pesticides with sediments into warm water (the temperature of the water should not be too high, preferably 40-50°C), and observe after 1 hour. If the precipitate dissolves, it means the emulsifiable concentrate has not yet failed and can be reused after the precipitate is dissolved. If the precipitate is difficult to dissolve or dissolve, it means failure.
Jinxiang Garlic is harvested in June each year, and our factory has an annual supply capacity of 5,000 MTS, which is available throughout the year.
High season: The last ten days from June to August. The refrigerated delivery period is from September to May.
The characteristics of Jinxiang high-quality garlic are: thick and bright skin, strong overall, plump bulbs.
Export standards and quality:
1. No tooth root, clean, no black mold, no rupture,
2. No cracks on the skin, no internal germination and growth, no insects or fungi.
Packing
Storing Fresh Garlic,Garlic Powder To Fresh Garlic,Fresh Garlic To Garlic Powder,Fresh Garlic Cloves
Jining Yuanheng International Trading Co.,Ltd , https://www.china-garlic-exporter.com