In early spring, the summer squash is cultivated, and it is easy to appear that the fruit enlargement stops halfway, yellowing, and wilting. In the end, it is dry, and this symptom may appear before and after flowering. It is commonly called melon. The following are the reasons for causing melon:

1. In early spring cultivation, the leaf assimilation function declines, and the photosynthetic accumulation of plants is less.

2. Because the squash is cross-pollinated vegetables, pollen development is poor under low temperature and high humidity, and it is not easy to disperse pollen. Female flowers cannot receive pollen fertilization and lead to melon.

3, early spring greenhouse cultivation, the impact of low-temperature short-day sunlight, resulting in more open female flowers of zucchini, less open male flowers, resulting in poor pollination and melon. Some varieties of pollen undergrowth at low temperatures can also cause melons.

Control methods: First of all, it is necessary to cultivate robust plants and promote the growth and development of plants. Second, to control the night temperature, to prevent the night temperature is too high, in order to reduce respiratory consumption; at the same time, before the application of carbon dioxide gas fertilizer, to promote assimilation. The third is artificial pollination or hormone treatment. Artificial pollination should be carried out before 9:00 a.m. on sunny days. The male flowers that are in full bloom in the day should be taken off and the petals removed. The entire stamens should be placed directly on the stigma of the male flowers for artificial pollination.

FLAT SLOTTER(CARBIDE)

FLAT SLOTTER(CARBIDE)

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