麦茎谷蛾发生规律及防治

Studies on the Occurrence and Control of Ochsencheimeria taurella Den et Schiff

麦茎谷蛾是山西南部麦田普遍发生的一种害虫,丘陵旱塬地区为害较重。严重为害时,仅后期(孕穗—灌浆)小麦被害穗率达30%以上。药剂防治试验表明,3月上旬卵态幼虫孵化时,用20%菊马乳油或40%甲基异柳磷乳油2000倍液喷雾,防治效果分别为94.4%和88.9%。

Ochsencheimeria taurella Den et Schiff is a pest that occurs frequently in the wheat fields in southern Shanxi.The damage was relatively serious in the hilly regions and make a lim- iting factor on wheat production in some parts.In the case of seriousness,the rate of injured spikes reached at 30% in the late growing period (booting-grouting).The spraying was done in early March when the larval ova were hatching.The 2000 times pesticides,20% JUMARUY- OU and 40% Isofenphos—methyl can have 94.4% and 88.9% control effects respectively.