In the production should be treated differently. 1. In the case of severe soil water shortage or soil moisture and water immersed in the roots, etc., can cause leaf curling. In the production, we should strengthen the ecological and environmental conditions of cultivation and management (soil looseness, drainage and irrigation, density, etc.), especially in the result period, the soil moisture should be maintained at 80% to 85%. 2. In the absence of phosphorus, potassium, boron, molybdenum and other nutrients in the soil, when the tomato plant can not meet the normal growth and development needs, it will also make the tomato roll leaf disease symptoms. For the physiological leaf curl caused by the deficiency of nutrients, the corresponding fertilizer or multi-element micro-fertilizer (such as boron deficiency can be sprayed with 0.1% borax solution) should be sprayed on the leaf blade. 3. In the early ripening of tomato, if too much fertilizer and water are applied, it will cause most of the leaves to roll up, especially in the period of fruit enlargement, and there will also be upward rewinding of the leaves. Prevention methods: In the cultivation and management, the implementation of formula fertilization, rational fertilization and watering, in order to improve the effective utilization of fertilizers, promote the robust growth of tomato plants. 4. In production, in order to promote fruit growth and fruit preservation, growth regulators are often used, such as 2,4-D, fruit-setting spirits, etc., but the 2,4-D concentration is too high or drops on the leaves. It will also cause the leaves to shrink and form leaf and yellow leaves. In order to prevent them from producing phytotoxicity, the concentration and method of use should be strictly controlled according to the weather conditions.
Crimp Go No-Go Gauges Equipments
Crimp Go No-Go Gages
Precision ground gages to quickly and accurately verify that the crimp diameter is within specified limits. Made from hardened A4 tool steel to last for many years of service.
· Sets available for major valve manufactures
· Custom sizes available
· Metric sizes only
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