1, pay attention to the scope of application. The anti-falling substance can be completely and effectively applied to the silk flower of the Solanaceae vegetable, but if it is sprayed on cucumber, green pepper and kidney bean, it will cause serious damage to the young tissue and the leaf, and it should be applied according to the scope of application in the manual, and cannot be expanded at will. Application range.
2. Pay attention to the application period and concentration. The application of ethephon on cucumber should be carried out during the flower bud differentiation period, 2.5-4 pieces of true leaf stage of cucumber, and the concentration is 3000 times or more. If the cucumber is young and the application concentration is too high, it is easy to cause phytotoxicity.
3. Pay attention to the method of use. Using the conditioner to smear, instead of immersing the entire flower in the conditioner solution, the stalk is applied with the conditioner solution. If you do not pay attention to the method of use, immersing the flowers in the liquid will cause phytotoxicity and cause the spread of gray mold.
4. Pay attention to the ambient temperature. Application of plant growth regulators should be carried out within a certain temperature range, low doses at high temperatures, high doses at low temperatures, otherwise high doses at high temperatures, prone to phytotoxicity; low doses at low temperatures, but not increased yield effect.
5, pay attention to correct diagnosis. Misdiagnosis can cause blind use of plant growth regulators. In early spring, due to low ground temperature, long seedling time and weak root activity, cucumber and tomato are prone to severe flower topping and rooting. At this time, if the vegetable farmers blindly spray a large number of Yunda---120 and flower-preserving and fruit-preserving plant growth regulators to stimulate plant growth, it will aggravate the flower topping and root physiological barriers.
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