Falling flowers and fruits affect yield how to protect flowers and fruits of zucchini

Greenhouse zucchini in the middle and later stages of fruit setting, there will be varying degrees of flower and fruit drop phenomenon, vegetable farmers do not know how to prevent and control, affecting the yield. Now the editor will introduce to you the prevention and control measures of zucchini falling flowers and fruits:

Zucchini

I. temperature control in the shed

After sitting on the melon, the temperature of zucchini was adjusted to 22 ℃ ~ 26 ℃ in daytime and 15 ℃ ~ 18 ℃ at night to increase the temperature difference between day and night, accumulate nutrients and promote fruit expansion. The temperature of the greenhouse can be controlled by uncovering the grass on time, timely ventilation and so on.

Second, lighting control in the shed

Uncover the grass curtain in time to prolong the light time and increase the light intensity of zucchini as much as possible. The broken grass and dust on the greenhouse film can be removed and cleaned in time to increase the light transmittance and temperature.

III. Strengthen the management of water and fertilizer

If the leaves of zucchini plant are thick and green, but blossom but do not bear fruit, supplement boron fertilizer in time. During the period of zucchini bud appearance, chlorophyll or spray Shibao is sprayed on the leaves every 10 days or so to prevent zucchini flowers and fruits from falling due to the lack of boron and other trace elements. And press the vine head with a larger lump of soil to inhibit the crazy growth of zucchini plants. If the plant is thin and the leaves are yellow and thin, it is necessary to increase water and fertilizer, remove the first female flower and promote vegetative growth.

IV. Prevention of poor fertilization

Dipping flowers and protecting fruits is the main measure to prevent poor fertilization from falling flowers and fruits. Zucchini use artificial pollination or hormone treatment such as anti-falling hormone in order to ensure sitting melon. The method is to pick the zucchini male flowers blooming at about 10:00 in the morning, remove the Corolla, gently daub the female flower stigma, artificial pollination, or select the female zucchini flower that will bloom. The female flower stigma and stalk were smeared with a mixture of 0.002% 2prime4murine D and 0.003% gibberellin to promote the expansion of zucchini and prevent poor fertilization.

5. Timely prevention and control of diseases and pests and removal of residual branches and leaves

Another cause of zucchini flower and fruit drop is diseases and insect pests, timely prevention and control of diseases and insect pests, strengthening ventilation, reducing humidity in the shed, regular application of pesticides, and timely removal of fallen petals and diseased leaves. In addition, in order to prevent germs from invading from the petals at the top of zucchini, you can apply a layer of carbendazim powder here.