宜昌市夷陵区属湖北西部,是三峡水利枢纽工程所在地,也是全国生态工程建设重点县(区),正在创建全国无公害农产品生产示范区.全区国土总面积33.59万hm2,其中耕地27 407hm2,果茶面积2 000hm2,林业用地面积25万hm2.常年种植作物面积在6万hm2左右,其中粮食3.5万hm2,蔬菜1.3万hm2.柑橘1.37万hm2,茶叶4 867hm2.害虫常年发生面积16.7万hm2左右,防治面积11万hm2,挽回经济损失1 600万元.

Based on the investigation of the damage of Bactrocera(Tetradacus) minax on different host plants, egg quantity and the effect of host plants on the pupal size, the fruit fly's selectivity for host plants was analyzed. The results indicated that the pupae length and diameter of the pest fed with satsuma orange are significant larger than those fed with navel orange, and no significant difference between hybrid orange and navel orange; the pupal weight is significant difference among the three host species; the egg quantity of female adults feeding with Satsuma orange is significant bigger than feeding with navel orange, and no significant difference between hybrid orange and navel orange; the damage rates are in following order: navel orange> hybrid orange>satsuma orange.

稻赤斑黑沫蝉Callitettix versicolor(Fabricius),属同翅目,沫蝉科.在我地属常见次要害虫,常年零星发生,但1990年以来,发生面积逐渐扩大,发生量不断上升,已成为我地水稻重要害虫.近年我县每年发生667 hm2～1334 hm2,造成粮食损失在1 000t以上,笔者通过近几年的田间调查结合笼养观测,对稻赤斑黑沫蝉进行了研究,现总结如下.