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本文记述福建地区为害柑桔三种象虫科食叶性害虫,即(1)大灰象虫;(2)大绿象虫;(3)长角小绿象虫。长角小绿象虫系国内尚未记载的柑桔害虫。这类害虫在本省柑桔产区及茶区发生较多,成虫主要食害嫩叶及幼梢,大灰象虫还能为害柑桔幼果,严重影响柑桔生产和育苗,需加防治。 大绿象虫一年发生一代,以成虫及幼虫在土中越冬。越冬成虫于4月中旬开始出土活动,6月中、下旬为发生最盛期。初步观察成虫能食害16科24种植物,主要食害柑桔类果树及茶、桑等植物。长角小绿象虫,一年发生二代,以幼虫在土中越冬。第一代成虫于4月末开始出土活动,以5月末至6月初,田间发生数量最大;第二代成虫于7月下旬出现,11月幼虫进入越冬期。 文中对三种象虫形态特征均有叙述。
This article describes the Fujian region of citrus three kinds of askew insects Division leaf-like pests, that is, (1) a large gray elephant worms; (2) large green elephant insects; Longhorn small green elephant insects is not yet recorded in citrus pests. Such pests in citrus growing areas and tea areas in the province occurred more, the main food insects, young leaves and shoots, ashes can also harm the citrus young fruit, seriously affecting the production and nursery citrus, the need for prevention and treatment. Large green elephant pests occur a generation a year, in order to adult and larvae wintering in the soil. Overwintering adults started unearthed in mid-April, and mid-to-late June was the peak. Preliminary observation of adults can eat 16 families and 24 kinds of plants, the main consumption of citrus fruit trees and tea, mulberry and other plants. Longhorn small green elephant insects, two generations a year, with larvae in the soil overwintering. The first generation of adults began unearthed at the end of April, with the largest number occurring in the field from the end of May to the beginning of June. The second generation of adults appeared in late July and the larva of November entered the wintering period. The article describes the morphological characteristics of the three elephants.