一、尖头瓜1、黄瓜开花期雌花没有受精,果实中不能形成种子,植株营养物质向果实运输的动力减弱,造成瓜条尖端营养不良,形成尖头瓜。可采用开花期人工辅助授粉或放蜂授粉进行防治。2、植株生长前期,氮肥供应不足,也可产生尖头瓜;增施氮肥可有效预防。3、植株长势弱,尤其是果实膨 First, the pointy melon 1, cucumber flowering female flowers are not fertilized, the fruit can not form seeds, plant nutrients to the power of the transport weakened, resulting in melon tip malnutrition, the formation of pointy melon. Artificial pollination can be used at flowering or put pollination control. 2, plant growth early, lack of supply of nitrogen can also produce sharp-headed melon; nitrogen fertilizer can be effectively prevented. 3, plant growth is weak, especially fruit swelling