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侏地土蝽Geotomus Pyrmaeus(Fah)和青革土蝽Maeroscytus subaeneus(Dall),属半翅目土蝽科,在我省和各县均有分布,主要为害豆类,花生、麦类禾本科杂草。成虫和若虫均在土中潜行,刺吸寄主根系的汁液,因此,往往易被人们所忽视。在一般情况下,为害不重,但虫口密度大时,寄主根系受损,吸收养份和和水份的机能显著下降,导致叶片变黄,生长衰弱,产量减低,甚至提早枯死。
Geotomus Pyrmaeus (Fah) and Maeroscytus subaeneus (Dall), which belong to the genus Heterodera, belong to the family Hemiptera, and are distributed in our province and counties, mainly affecting legumes, peanuts and cereals. grass. Both adults and nymphs sneak in the soil, pricking the juice of the host’s root system, and are often easily overlooked. Under normal circumstances, the damage is not heavy, but when the density of insect population is large, the host’s root system is damaged, the functions of absorbing nutrients and water are significantly reduced, leading to yellowing of leaves, weakening of growth, decreasing of yield and even premature death.