1965年5月19日我们在调查麦类黑穗病时,曾在小麦上发现有“白穗团”,当即取其白穗进行剥查研究,确定其为大螟为害所致,日后又先后在阜宁地区的阜城、施庄等地也有发现,这就表明大螟不仅为害小麦,也为害大麦。 初步调查,大螟为害麦类有以下的规律: 1.初孵幼虫集聚叶鞘内取食为害。 2.幼虫到二龄即分散,分散后90％左右的白穗是一株一头幼虫,10％左右的是一株两头,二头以上的 On May 19, 1965, when we investigated the smut of wheat, we found that there was a “white spike” on the wheat. In Funing area Fucheng, Shi Zhuang and other places have also been found, which shows that Sesamia inferens not only harm wheat but also harm barley. Preliminary investigation, Sesamia inferens wheat has the following rules: 1. The newly hatched larvae gather leaf sheath for food damage. 2 larvae to the second instar that is dispersed, scattered about 90% of white spike is a one-headed larvae, about 10% is a two, two or more