The suitable period of autumn cucumber spraying ethephon is 2 to 3 true leaves of seedlings. Generally use 40% ethephon 2000 ~ 2500 times solution, according to the number of treatment in the specific application. If it is sprayed 2 times, it should be sprayed with 2000 times liquid. After 7 to 10 days, when the plants are 5-6 leaves, they can be sprayed once. If it is sprayed three times, its spray concentration should be properly reduced and it can spray 2500 times. If the use of concentration is not good, it is easy to produce phytotoxicity. What should I do to remedy the problem of treating cucumber with ethephon? The author suggests: First, increase the available nitrogen fertilizer, increase the number of watering, in order to promote the rapid growth of cucumber. Second, to increase the greenhouse temperature, the suitable growth temperature of cucumber seedlings is 25°C to 28°C during the day and 13°C to 15°C during the night. After the occurrence of phytotoxicity, the temperature in the shed should be raised to 30°C during the daytime to promote the growth and development of seedlings, maintain the original temperature at night, and ensure that female flowers continue to differentiate. The second is to promptly spray Yunda 120, Green Wind 95 and other plant growth regulators. High Ozone UV Lamp, Ozone UV Lamp, Amalgam UV Lamp Ningbo Sunfine UV lighting Co.,ltd. , http://www.uvlightings.com
Cucumber Ethylene drug damage remedies
In early autumn, the temperature is still relatively high. After planting, the growth and development of cucumber is affected by temperature and light. The formation of female flowers is relatively late, and it is too late to sit and melon. At this time, growers often use ethephon for treatment, but they are often caused by improper handling. The phytotoxicity caused the growth of autumn cucumbers to stagnate, and the flowers appeared to be topping, and the serious growth points died of dryness.