What kind of weather spray pesticides are effective

The weather when spraying pesticides is different, and the effect of spraying is not the same.

(1) Different types of pesticides can also affect the temperature at which the drug effect is exerted. For example, the use of dichlorvos, dimethoate, trichlorfon, and acetophos-methyl for spraying in the range of 20-30°C is better. The drugs such as chrysanthemum and lime sulfur are suitable in the range of 15-25°C.

(2) When the weather is hot, it should be applied when the temperature is lower, preferably in the sunny hours from 4 to 7 o'clock, or on a cloudy day, but some drugs are different, such as herbicides, dry grass phosphorus in sunny weather The effect of spraying at high times is better than cloudy. Bordeaux liquids are prone to phytotoxicity on cloudy days.

(3) The use of pesticides should be good in the absence of wind or breeze days. If 2.4-D butyl ester is used on windy days, it will affect neighboring crops and cause disputes between neighboring lands.

(4) Do not spray on rain or dew. Because the application of rain and dew in the ground can dilute the concentration of agents, reducing efficacy.

Use 2.4-D and 2.4-D Butyl Ester Correctly

Both 2.4-D and 2.4-D butyrate belong to benzene itch substances, 2.4-D is mainly used for flowering of vegetables, and 2.4-D butyric acid is a herbicide. 2.4-D has different effects on the same crop tissue due to different amounts and concentrations. When the concentration is low, the development of fruit set and seedless fruit can be promoted, and if the concentration is slightly higher, it will cause growth abnormalities. Higher concentrations can kill plants and use them as herbicides. 2.4-D is insoluble in water and soluble in alcohol. Therefore, it is necessary to mix the original solution, then dilute it with the required concentration and add water. Take 1 gram of 2.4-D powder and pour it into 5 ml of alcohol. After warming and dissolving, pour in 995 ml of boiling water, that is 100 mg/kg of stock solution. To prevent the concentration of tomato drop fruit 15 mg / kg, that is, take the original solution 15 mg liters of water made of 985 ml. The dipping method is to pour the prepared solution into the small cup and then dip the opened flower into the cup and dip it into the flower stalk. The dip method is to apply the solution on the pedestal and the female stig You can. However, when used, the concentration should not be too high, and it should not be sprinkled on the leaves and growing points during treatment. The treated fruits cannot be preserved.

2.4-D Butyric Emulsion is a good herbicide that can remove a wide variety of dicotyledonous weeds. Our district has been used for many years, 70% of the 2.4-D butanol consumption of 50-70 grams per acre, watered 20- 25 kg. Selecting windless weather when spraying can, in particular, pay attention to the safety of the crops in the adjacent plots, and spray equipment should be used exclusively.

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