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所谓“化瓜”即在雌花开放后,幼瓜自然萎缩脱落的现象。在正常气候条件下,约有47%的雌花不能坐果,严重影响西瓜早期产量,推迟上市季节。导致化瓜的原因,主要是植株徒长,营养生长和生殖生长失调;种植过密,蔓叶郁蔽,影响光合作用;花期遇阴雨和严重干旱,授粉受精不良。其主要防治措施如下:
The so-called “melon ” that is, after the female flowers open, the phenomenon of natural shrinkage of young melons. Under normal weather conditions, about 47% of female flowers can not be fruit, seriously affecting the early yield of watermelon, postponed the season of listing. The causes of melon, mainly plant growth, vegetative growth and reproductive growth disorders; planting too dense, vine leaves Yu, affect photosynthesis; flowering encounter rainy and severe drought, poor pollination and fertilization. The main control measures are as follows: