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食叶害虫每年都给苏联的国民经济带来巨大的损失。由于食叶害虫的周期性的大发生,常常导致成片的果园、森林和人工栽植林的死亡。天幕毛虫(Malacosoma neustria L.)就是这些广泛分布的害虫之一。根据多年来的观察(1959～1976年),核多角体病毒对减轻此害虫种群量起着重要的作用。如在白俄罗斯,由于天幕毛虫自然种群反复地出现病毒流行病,使很多果园的种群数量明显地下降。据此,曾从天幕毛虫地方种群中分离出核多角体病毒,在此基础上由拉脱维亚农学院和白俄罗斯植物保护研究所共同协作,研制出防治天幕毛虫的新微生物制剂——。
Leaf-feeding pests have caused huge losses to the Soviet economy every year. The cyclical occurrence of leaf-eating pests often leads to the death of fallen orchards, forests and planted forests. The Malacosoma neustria L. is one of those widely distributed pests. Based on years of observation (1959-1976), NPV plays an important role in alleviating this pest population. As in Belarus, the population of many orchards has dropped significantly as a result of the recurring virus epidemic due to the natural population of the celestial beetle. As a result, a nuclear polyhedrosis virus was isolated from a local population of Aria caterpillars on the basis of which a new microbiological preparation for the control of Arial caterpillars has been developed by the Latvian Agricultural Academy and the Belarusian Institute of Plant Protection.