Effect of high melon rate on cucumber yield how to control cucumber melon

Cucumber melon refers to the phenomenon that after the formation of female flowers, it can not continue to grow into commercial cucumbers, but gradually wilt and fall off, also known as physiological withered fruit or aborted fruit. Melon is the most common problem in cucumber cultivation, especially cucumbers cultivated in greenhouse, if mismanaged, the melon rate is as high as 50%, which seriously affects the yield of cucumbers.

Cucumber into melon

Prevention and control methods:

① pollination. The unisexual fruiting ability of a few cucumber varieties can be reduced by about 70% by artificial pollination and raising bees in the greenhouse to stimulate the expansion of the ovary and reduce the melon rate.

② enhances lighting. As long as the temperature outside the shed is not lower than-20 ℃, even if it is cloudy, the curtain should be opened for a short time around noon to make cucumber plants receive scattered light. When there are conditions, agricultural infrared lights can be installed to replenish light and increase temperature.

Foliar fertilizer spraying and hormone treatment of ③ cucumber. Using 1% potassium dihydrogen phosphate plus 0.4% glucose and 0.4% urea, and 15.5 mg / L Baogaling, Qiangzengguaobao, spraying foliar, is also very effective. You can also use Zenggualing to dip in cucumber female flowers or spray flowers, and you can also use expander to spray cucumber plants or flowers.

④ temperature control. If a large number of melons appear in the later stage of cucumber in winter and spring, the temperature in the greenhouse should be controlled from low, 23: 25 ℃ in sunny day, not more than 28 ℃ in sunny day, and 10: 12 ℃ or lower at night. When the temperature is too high, the ventilation management should be strengthened and the temperature of the greenhouse should be controlled within the range suitable for the normal growth and development of cucumber.

If the melon is caused by low temperature in the deep winter, the temperature in the greenhouse should be increased as much as possible, especially the soil temperature. The lowest soil temperature should not be less than 10 ℃, which should be more than 14 ℃. The improvement of ground temperature does not necessarily depend on greenhouse structure or sunny weather. When planting cucumbers, vegetable farmers can bury corn straw between cucumber rows, or spread corn straw, and use the heat generated by corn straw decomposition to increase soil temperature.

⑤ coordinated the relationship between vegetative growth and reproductive growth of cucumber. In view of the phenomenon of melons caused by growth imbalance caused by "falling seedlings" due to untimely harvesting, fertilizer and water management should be strengthened and melons should be picked in time.

There is also a kind of melon caused by the overgrowth of cucumbers, because the harvest is too frequent, there is no exuberant cucumber on the plant, and the stems and leaves are mostly fed by nutrients. as a result, the stems and leaves grow too vigorously, and the plant takes another metabolic pathway. nutrition no longer supplies the growth of young melons. The best way to prevent is to pay attention to the harvest standard, not only to harvest in time, but also to keep at least one vigorous growth melon on the plant, such as lack of water and fertilizer, to increase the amount of water and fertilizer.