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.
Control methods for leeks, onions, and garlic root leeks, onions, garlic, etc. are vegetables cultivated on a large area in our city, but roots and roots often endanger the roots and stems below the surface, causing the leaves to turn yellow, resulting in wilting and death. The reason for the occurrence of root carcasses was mainly due to the application of raw manure that was not fermented properly, especially human manure as the base fertilizer. After the temperature rose, the fertilizer fermentation induced seed fly spawning and larvae. Specific prevention methods are as follows:
One is to use well-fermented fertilizers as base fertilizers, preferably summer feces or every other year. The second is top-dressing fertilizer. The third is to use 50% dichlorvos 50 grams of water 1 kilogram of mixed wheat bran 2 kg, spread the field to trap and kill the flies. Root can be used after 40% dimethoate 1000 times irrigate or 90% trichlorfon 800 times irrigate root, have a good effect. The fourth is to use the plant ash to prevent and control. It is to spread the plant ash to the surface, and then use the squat or deep hoe to mix the ash with the soil, so as to prevent insects and increase the yield, which can be described as double benefit.
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