Correct use of common pesticides

1. bt powder, bacillus, acaricidal bacteria, etc. in biological preparations are commonly used bacterial pesticides, and its insecticidal effect is related to the number and activity of bacteria. It requires a suitable temperature of 20 ~ 30 °C, humidity needs to be larger, and requires direct sunlight. It is best to apply the medicine in the morning or evening when there is dew or in cloudy weather. It is worthy of special attention that the use of such pesticides in combination with fungicides will greatly reduce their activity.
2. There are many pesticides that are stable in acidic and neutral media, but are easily decomposed in the presence of alkalis. Such pesticides include Rhizoctonia, antivirinic acid, mancozeb, scylloxacin, procaine, carbendazim, jinggangmycin, rotenone, diflubenzuron, phoxim and pyrethroids. Therefore, such pesticides cannot be mixed with alkaline pesticides such as ropazone, Bordeaux mixture, sulfur suspension, and lime sulfur, otherwise it will reduce the efficacy.
3. Copper preparations such as chlorhexidine copper, copper sulphate, copper sulphate, copper oxychloride and the like are commonly used as a class of pesticides. However, many pesticides such as thiophanate-methyl, carbendazim, zesin, mancozeb, benomyl, and thiram can not be mixed with copper preparations. half.
4. Some pesticides, such as Enkeson, Phoxim, and Rotenone, are easily decomposed. Therefore, you should choose cloudy days, or use it sooner or later. For example, the use of phoxim spray, its effective period is only 3 to 5 days, but the distribution of medicinal soil in the ground to control underground pests, the validity period can be up to 1 month.
5, melons, beans are more sensitive crops, in the melon crops should be used with caution dichlorvos, phosphine aluminum, enemy cough, phoxim, insecticide double, destroy Wei Wei; legume crops should be careful with dichlorvos , Trichlorfon, Insecticide, Deterrence, etc.

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