When you look at the label first, look carefully and be deceived.
The label is intact without damage, and the writing is clear and without defects;
The name of the pesticide should be identified and the active ingredient must be indicated.
Look at the three cards before buying, the number code has provisions;
Drug inspection by the Ministry of Agriculture, domestic pesticides are lacking;
There are differences in imported pesticides, only the pesticide registration number.
The pesticide category looks at the ribbon, and the red, yellow and black areas are separated;
Black bactericidal red insecticide, green field weed control,
The yellow adjustment promotes growth, and the ribbon is forgotten.
If the label is wrong or changed, be alert when purchasing.
Second, look at the appearance of the product, master the characteristics of careful.
Suspended water powder smoke agents have different appearances.
Appearance color shape should be known, and the form is not confused.
The emulsifiable oil is viscous and the turbid layer is unqualified.
The water is milky white or thick, and the appearance is opaque.
Liquid stratification or freezing, product deterioration can not be bought.
The hanging milk is white or light in color, and the flow is viscous and suspended;
It is easy to precipitate and is characterized by long-term storage and storage;
The lower layer is thickened and the upper layer is thin, and the layer is deposited on the bottom of the bottle;
If the sway can be suspended, the product still does not expire;
Precipitation shaking is difficult to recover and can not be used to reduce the effect.
The liquid agent is semi-transparent or transparent, and does not contain a uniform suspension;
Precipitation at low temperature, and temperature can be dissolved;
Qualified products have this, the quality of use does not affect;
The temperature is precipitated and insoluble. The quality is difficult to protect and there is fear.
Wet powder is fine powder, if it has such good quality;
Powder coarse grain unity block, the quality of the expired has deteriorated.
The size of the granules is divided into small pieces, and the qualified product particles are fine;
The particles break up the raw powder and spread the waste medicine;
Damage to the body's environment, product quality is difficult to guarantee.
Third, look at the traits of pesticides and determine the quality of the active ingredients.
Quality standards are difficult to identify in general.
Technical testing is inconvenient, and the efficacy of the drug can be tested in the field;
SD objects and dosage, if not the same as the effect;
If the gap is too large, it will not be effective, and the suspected component content will be reduced.
Physical properties should also be seen, all kinds of formulations in the water test.
The emulsifiable concentrate depends on the emulsification, and the water test is feasible;
Soluble in good emulsifiable water, immediately spread into clouds;
The liquid emulsifiable concentrate does not appear, and the oil droplets are easily formed into flakes;
Difficult to diffuse into the water, coarse oil droplets floating surface;
Fine oil beads are easy to polymerize and the stability of the liquid is not reliable.
Wet powder suspending agent, wet spreading liquid first;
First, pick up the dry leaves, and squeeze the petioles into the liquid surface;
Watch again after a few seconds, and then judge according to the liquid spot;
If the liquid leaves are full, the wet performance is good;
If the liquid leaves are not stained, it indicates that the medicine is not wet.
The fineness of the powder should also be seen, and the quality of the inspection can be exempted;
The higher the fineness, the better the quality, and the measurement method is much better;
Scientific measurement should be screened, and the simple method is to pinch it by hand;
The thumb index finger pinches the powder and rubs against each other slowly;
Look for the feeling after the powder is finished. The finer the fineness, the better.
The smoke agent is easy to absorb moisture, and the hand-pinch packaging is indispensable;
Packed soft and good products, moisture absorption and agglomeration are not available.
to sum up
The pesticide must be purchased three times, and the pesticide should be kept safely;
The temperature is too high or too low, and the humidity is too high;
If the chemical fertilizers and pesticides are confused, it will be difficult to shorten the duration.
More pesticide knowledge, please pay attention to China Pesticide Network
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