Last summer's summer solstice, Chen Shu, an old fruit farmer in Songkou Town, Meixian County, used pesticides in the orchard. Because the pesticide labeling text is too small to be used, it can be directly used according to the concentration of conventional pesticides. As a result, the medicinal damage causes the entire orchard to fall and fruit. Very serious.
Coincidentally, this year's vegetable farmer Huang Shu of my hometown, when using pesticides in his vegetable fields, saw a column of pesticide use, and he was at a loss. In the evening after two days of delay, he took the pesticide to the farm to ask me how to use it.
His pesticide name is "Sanqiong", and the net content of the bottle is 300 grams. The labeling is as follows: lambda-cyhalothrin, active ingredient content: 2.5%, dosage form: microemulsion, and methods of use and techniques (eg table).
Indeed, in a farmer with a low culture, such a table description is really difficult to understand in the field. It is not directly using the dilution method to indicate the use method, but using the active ingredient to make the ratio. It is difficult for people to be clear in time.
According to the explanation, it is necessary to determine the drug/water ratio based on the analysis of the content of the active ingredient, the amount of the active ingredient, and the net content of the bottle. The key is the conversion of hectares and acres, kilograms and grams. Huang Shu almost used 10 grams (7.5-15 grams of intermediate) pharmacy to spray 45 kilograms of water (ie 4500 times liquid spray), and later felt that it was too weak to be effective, decided to take the medicine to ask.
Analyze its description:
A, the active ingredient should be: 2.5 grams of the original drug per 100 grams, then 300 grams of the bottle contains 7.5 grams of the original drug.
B. Usage and use technology: The dosage of 15 mu per hectare is 7.5-15 grams, which means that the dosage of 45 kg (45000 g) per 0.5-1 g of water is 1 mu.
That is to say, with 0.3-0.6 kg (300 g - 600 g) of the drug with 675 kg of water. In fact, it is better to spray directly with a dilution concentration (about) of 1000-2000 times, so that the simple use method and the use technology can be used.
It is said that whether it is a chemical pesticide or a biological pesticide , it is all discovered through scientific research or the invention of the manufacturer. It can be sold in the market. It must be tested, verified and demonstrated by professional authorities. Under the premise, it is only declared after the state has approved the production. The description of the logo should be prepared in strict accordance with the state regulations and strictly according to the actual situation. The authenticity and feasibility of the logo should be supervised and verified. It can be used only after it is true and true.
However, there are many phenomena indicating that pesticides are not standardized or complicated and abstract. There are many cases that are not conducive to the practical operation of farmers. It is not appropriate to use the laboratory registration original data such as hectares (measured in rural areas) or ppm concentration to directly mark the instructions. In addition, the replacement of the original drug name, that is, too many product names (so called a thief) will cause the mistake of reusing the same pesticide. In addition, the logo description text is too small, so that the old farmers can not see clearly can also cause misuse of pesticides. There are also banned crops, etc., which will cause hidden dangers of agricultural products and so on.
The frequent occurrence of misunderstanding of the logo, causing misuse, loss of agriculture or unsafe agricultural products in rural areas should be highly valued. According to the China Pesticide Network , China's training on agricultural knowledge for farmers is far from enough. It should be considered in conjunction with the actual situation of farmers to make simple identification instructions. It is recommended that the pesticide instructions be simplified as much as possible so that the farmers can see at a glance and it is more conducive to the safety of agricultural products.
Refrigerant Pressure Gauge
Refrigerant pressure gauge also known as Freon gauge is used to measure the pressure of a freezing system inside a refrigeration system or equipment.
Refrigerant pressure gauge
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