论文部分内容阅读
(1)球坚介壳虫在山东一年发生一代,寄主为桃及杏树,以二龄幼虫在寄主枝条裂縫处越冬。(2)雌虫介壳黑褐色圆球形,为体壁加厚膨大形成;雄虫介壳灰白色长椭圆形,为体壁分泌的腊质形成。雄虫有蛹期,雌虫则无。雄成虫口器退化不能为害。(3)初孵化的幼虫爬行活泼,触角及足很显著,丝状口器尚未生出;待固着后口器伸长,体背有白色腊丝盖覆。越冬后雌雄性渐渐分化;雌虫长椭圆形,较大。雄虫较小,在体背末端有二黄白色斑紋。(4)雄虫四月中旬羽化交尾,一雄虫能与数雌虫交尾,雄虫寿命二天左右。(6)雌虫五月上旬产卵,卵产于腹面凹陷内,24小时内一雌虫可产卵413粒,每头雌虫一生最少产卵100余粒,雌虫产卵完毕后,即死亡枯干在寄主枝条上。⑥雌虫不与雄虫交尾,亦能产卵,卵亦能孵化为幼虫。(7)黑缘瓢虫是此种球坚介壳虫的主要天敌,此种瓢虫在济南每年发生一代,以成虫越冬。(8)春季三月下旬,以波美表4.5度的石灰硫磺合剂稀释液喷杀此种介壳虫,有80—95%的杀虫效果。
(1) Goldeneye scale insects occur in Shandong one generation a year, the host is peach and apricot, the second instar larvae in the host branch cracks at the winter. (2) The female melatonin was dark brown in color and spherical in shape, which formed thickening and enlargement of the body wall. The gray and white oval shell of the male was formed by the wax body secreted by the body wall. Male pupae, females are not. Male adult mouth degeneration can not be harmful. (3) The newly hatched larvae crawl lively, and the antennae and foot are significant. The filiform mouthparts have not yet emerged. After the mouthparts are fixed, the mouthparts are elongated, and the body is covered with white wax. Overwintering male and female gradually differentiated; female oblong, larger. Male smaller, yellowish white markings at the end of the body back. (4) Male mid-April feather copulation, a male and female number of female mating, male life of about two days. (6) The female spawns in early May, and the egg is produced in the ventral recess. One female can lay 413 eggs in 24 hours. Each female has at least 100 eggs per spawn during her lifetime. After the female spawns, Death withered in the host branch. ⑥ females do not mate with the male, can spawn eggs can hatch into larvae. (7) Black-rimmed ladybugs are the main natural enemies of this ball-bearing scale insects, such ladybugs occur in Jinan each generation, with adult wintering. (8) In late spring of March, the scale insecticide is sprayed at a 4.5-degree lime-sulfur compound dilution of Baume & Assam, with 80-95% insecticidal effect.