Plant growth regulators have been widely used in vegetables, bringing considerable benefits to vegetable farmers. However, some vegetable farmers rely too much on plant growth regulators to increase the dosage, increase the concentration, cause phytotoxicity, and cause unnecessary losses. In order to avoid the occurrence of the key, the following items should be noted when using plant growth regulators:
1. Pay attention to the scope of application. The anti-fallin can be safely applied to the scent of the vegetable of the Solanaceae, but it cannot be used to spray vegetables such as cucumber, green pepper and beans, otherwise it will cause serious damage to the young tissues and leaves. Yunda-120 can be used for food crops, but it can not be used in Solanaceae plants. If sprayed, it will cause the eggplant to grow wild and bear small fruit. Therefore, before using the plant growth regulator, be sure to read the instructions carefully to understand the scope of application, and should not expand the scope of application.
2. Pay attention to the application period and concentration. Ethephon should be applied to cucumbers, and should be sprayed during the flower bud differentiation period, 2.5-4 true leaves of cucumber, and the concentration should be 3000 times or more. If the cucumber is young and the application concentration is too high, it is easy to cause phytotoxicity. When eggplant and tomato are used in the normal concentration of anti-fallin, if the application is not marked, repeated flowering will cause phytotoxicity.
3. Pay attention to the method of use. Using a conditioner, the flowers are not applied to the flower, but the conditioner solution is applied to the handle. If you do not pay attention to the method of use, apply the conditioner solution to the stamen, which will cause phytotoxicity and cause the spread of gray mold.
4. Pay attention to the ambient temperature. The plant growth regulator should be carried out within a certain temperature range, and the concentration should be adjusted accordingly with the change of temperature. The concentration should be lower when the temperature is high, and higher when the temperature is low. Otherwise, a high concentration of the drug is used at high temperatures, which is prone to phytotoxicity. When the temperature is low, the low concentration of the drug can not achieve the effect of increasing production. The application of the anti-falling substance to the tomato causes a phytotoxicity even if the temperature is lower than 15 ° C and higher than 30 ° C at a normal concentration. At low temperatures, the umbilical part of the tomato is easily formed into a milk-like smear, and at high temperatures, the umbilical part is radioactively cracked. In general, the flower-regulating fruit conditioner contains some easily drifting chemical components such as 2,4-drip, and it is easy to cause damage to plant leaves or adjacent sensitive crops due to drift at high temperature.
5. Pay attention to the application time. Flower buds are safely and effectively applied to cucumbers, and should be used in the middle of cucumber growth. If the flower buds are sprayed at the seedling stage of cucumber, it will cause damage to the cucumber.
6. Pay attention to the correct diagnosis. Misdiagnosis can cause blind use of plant growth regulators. In early spring, due to low 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, Hualeibao and other flower-preserving and fruit-preserving plant growth regulators to stimulate plant growth, it will aggravate the physiological phenomenon of flower topping and root-rooting.
Huaxian Agricultural Technology Promotion Center Writer: Lu Shuguang
1. Pay attention to the scope of application. The anti-fallin can be safely applied to the scent of the vegetable of the Solanaceae, but it cannot be used to spray vegetables such as cucumber, green pepper and beans, otherwise it will cause serious damage to the young tissues and leaves. Yunda-120 can be used for food crops, but it can not be used in Solanaceae plants. If sprayed, it will cause the eggplant to grow wild and bear small fruit. Therefore, before using the plant growth regulator, be sure to read the instructions carefully to understand the scope of application, and should not expand the scope of application.
2. Pay attention to the application period and concentration. Ethephon should be applied to cucumbers, and should be sprayed during the flower bud differentiation period, 2.5-4 true leaves of cucumber, and the concentration should be 3000 times or more. If the cucumber is young and the application concentration is too high, it is easy to cause phytotoxicity. When eggplant and tomato are used in the normal concentration of anti-fallin, if the application is not marked, repeated flowering will cause phytotoxicity.
3. Pay attention to the method of use. Using a conditioner, the flowers are not applied to the flower, but the conditioner solution is applied to the handle. If you do not pay attention to the method of use, apply the conditioner solution to the stamen, which will cause phytotoxicity and cause the spread of gray mold.
4. Pay attention to the ambient temperature. The plant growth regulator should be carried out within a certain temperature range, and the concentration should be adjusted accordingly with the change of temperature. The concentration should be lower when the temperature is high, and higher when the temperature is low. Otherwise, a high concentration of the drug is used at high temperatures, which is prone to phytotoxicity. When the temperature is low, the low concentration of the drug can not achieve the effect of increasing production. The application of the anti-falling substance to the tomato causes a phytotoxicity even if the temperature is lower than 15 ° C and higher than 30 ° C at a normal concentration. At low temperatures, the umbilical part of the tomato is easily formed into a milk-like smear, and at high temperatures, the umbilical part is radioactively cracked. In general, the flower-regulating fruit conditioner contains some easily drifting chemical components such as 2,4-drip, and it is easy to cause damage to plant leaves or adjacent sensitive crops due to drift at high temperature.
5. Pay attention to the application time. Flower buds are safely and effectively applied to cucumbers, and should be used in the middle of cucumber growth. If the flower buds are sprayed at the seedling stage of cucumber, it will cause damage to the cucumber.
6. Pay attention to the correct diagnosis. Misdiagnosis can cause blind use of plant growth regulators. In early spring, due to low 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, Hualeibao and other flower-preserving and fruit-preserving plant growth regulators to stimulate plant growth, it will aggravate the physiological phenomenon of flower topping and root-rooting.
Huaxian Agricultural Technology Promotion Center Writer: Lu Shuguang
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