Recently, some vegetable farmers have reported that the squash in the greenhouse has fallen and fallen, and it is not known how to control it. Summarize the prevention and treatment measures for fruit drop and fruit drop of zucchini for reference by farmers:
First, the temperature control
In the fruiting stage of Zucchini, after sitting on the melon, the regulating temperature is 22°C～26°C during the day and 15°C～18°C during the night, which increases the temperature difference between day and night, accumulates nutrients, and promotes fruit enlargement. The temperature control is mainly to expatiate on time, timely ventilation and so on.
Second, indoor lighting control
Uncover the grass curtain in time to extend the lighting time as much as possible and increase the light intensity. Clean the shed grass and dust on the shed film in time to increase the light transmittance and increase the temperature.
Third, strengthen water and fertilizer management
If the plant leaves are thick green and hypertrophy, flowering does not result, and boron fertilizer is added in time. When the buds appear at the beginning of the zucchini, the leaves are sprayed once every 10 days or chlorophyll or sprayed to prevent the lack of trace elements such as boron. If the fruit is stunted and the fruit is falling, use a larger piece of soil to suppress the creeping head and restrain the plant from going mad. If the plants are thin and the leaves are yellow and thin, water and fertilizer must be added to remove the first female flower and promote vegetative growth.
Fourth, to prevent poor fertilization
Decorating fruits and fruits is the main measure to prevent poor fertilization and fruit drop. The use of artificial pollination or treatment with hormones such as decanosides can ensure the squash. The method is to pick the male flowers that are open on the day around 10:00am, remove the corolla, and gently apply artificial pollination on female styling, or select female flowers to be opened, using 2,4-D at a concentration of 20ppm and a concentration of 30ppm. The gibberellin mixture was applied to the stigmas and stalks of female flowers to promote fruit enlargement and prevent poor fertilization.
V. Prevent and treat pests in time to remove debris
Diseases and insect pests are another cause of falling fruit and fruit in the zucchini, timely control of pests and diseases, strengthening ventilation, reducing the humidity in the greenhouse, applying pesticides on a regular basis, and removing fallen petals and old leaves of diseased leaves. In addition, smearing a layer of carbendazim powder on the petals of the top of the zucchini fruit can prevent the bacteria from invading the fruit and causing the fruit to fall off.
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