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山东烟台专区花生产地,近几年来,发现玉米螟发生为害。1957年8月13日我们在文登县大水泊村调查花生病虫害时,首次发现玉米螟幼虫蛀茎为害;1959年8月中旬在烟台市郊福山镇公社大沙埠、房家(田仝)等两个大队调查,发现花生复叶反面有玉米螟卵块,调查结果见表1、2。 据初步观察,卵孵化后,幼虫爬行至花生顶端,潜伏到未展开的嫩复叶里取食叶肉,剩下成长圆形的白色表皮;幼虫2龄时,便开始向下转移至主茎中部与侧枝交杈处蛀孔,钻入其内为害。被害部位,极易被风吹折,并影响产量。
Shandong Yantai area flower production in recent years, corn borer found harm. August 13, 1957 When we investigated peanut diseases and pests in Dashuipu Village, Wendeng County, we found for the first time that the corn borer larvae were damaging to the stems and stems. In mid-August 1959, they were found in Dashabu commune, Fushan Town, Yantai suburbs Investigation of two brigade found peanut compound opposite the corn borer eggs, the findings in Table 1,2. According to the preliminary observation, after hatching eggs, the larva crawled to the top of the peanuts, lurking into the undeveloped tender compound leaves and feeding on the mesophyll leaves, forming a round white skin. When the larvae were 2 years old, they started to move downward to the middle of the main stem And branches at the twig bore hole, drill into the damage. Victims, vulnerable to the wind blowing, and affect the yield.