一、虫害荸荠白螟是主要虫害。成虫呈白色,大小与三化螟相近,老熟幼虫黄白色略带灰色。以幼虫蛀食茎杆,为害初期荸荠茎尖部褪绿枯萎,自上而下逐渐变红转黄,茎杆变褐腐烂,最后全株枯死。在分蘖分株期受害,分蘖减少,在结球期受害,影响球茎膨大,产量减少。白螟一年发生4代,以第4代为主害化,螟蛾盛发 First, pest water chestnuts white borers is the main pest. Adult white, size and Borer near similar, mature yellow-white larvae slightly gray. The larvae eaten stem, the early water chestnut cauline tip chlorotic withered, top-down gradually turn red yellow, brown stalk rot, and finally the whole plant died. Injured in the tillering ramets, tillers reduce the damage at the node, affecting bulb swelling, reduced production. White borer four generations a year, the fourth generation of the main harm, moth Sheng