红蜘蛛

• The population quantity of lithocolletis ringoniella mats , made up the absolute predominance from the middle ten days of july to the beginning of august and the population quantity of aphis citricola van der goot made up the absolute predominance from the last ten days of april to the beginn ing of june
  山楂红蜘蛛种群数量在3月中旬4月中旬占绝对优势，金纹细蛾种群数量在7月中旬8初占绝对优势，绣线菊蚜种群数量在4月下旬6月初占绝对优势。
• The over - wintering form population of hawthorn spider mite in free - pollutant culture apple orchard was ground orchard > southern exposure orchard > northern exposure orchard . there had significant level at 0 . 01 among these three orchards . culture condition affected the distribution of tetranychus viennensis zacher also
  果园立地类型对越冬态山楂红蜘蛛的分布有着显著的影响，越冬态山楂红蜘蛛种群数量平地园阳坡园阴坡园，三者之间差异达极显著水平。
• Tetranychus viennensis zacher in trunk were concentrated in old crack barks and girdling cracks . tetranychus viennensis zacher in first and second limbs were concentrated in the boundary of axial shoot and stem , axial shoot and center trunk , girdling cracks , pruning wound and aerial roots et al . these tetranychus viennensis zacher were distributed mainly in the shady side of the branch
  主干上的山楂红蜘蛛主要集中在老翘皮下及环剥裂缝内，分布于第1 、 2层主枝上的红蜘蛛主要集中在主枝与主干、主枝与中心干交界处、环剥裂缝、剪锯口、气生根等处，且主要分布在枝条的背阴面(下部) 。
• The results showed that in the single predator - single prey system of d . catalinae and t . nr . fijiensis , the adult female of d . catalinae had significantly different feeding preference in selecting the stages of t . nr . fijiensis , with the most preference of the eggs followed by larva , protonymph , deutonymph and adult respectively
  结果表明：在小黑瓢虫与红蜘蛛“单种捕食者?单种猎物”作用系统中，小黑瓢虫雌成虫对红蜘蛛各虫态的取食呈现选择性，其中最喜取食卵，其次为幼螨，最不喜食成螨。
• Fijiensis and myzus persicae ( sulzer ) . in order to investigate the influence of alternative preys on the ladybird , comparison between its alternative preys and natural prey bemisia tabaci ( gennidius ) was studied in the laboratory , and the results showed that the beetle could not oviposit when feeding exclusively on m . persicae , but the adult longevity was n ' t significantly changed compared with those feeding on natural prey
  ( 2 )小黑瓢虫分别以三种猎物为食时，均表现为雌虫的寿命大于雄虫的寿命， t测验表明，以蚜虫为猎物时，雌雄成虫寿命之间的差异达到极显著水平；以红蜘蛛为猎物时，雌雄成虫寿命之间无显著差异；以烟粉虱为猎物时，雌雄成虫寿命之间的差异达到显著水平。
• In this dissertation , the interactive system of delphastus catalinae ( horn ) , its preys and competitor was studied , including comparison between alternative preys and natural prey consumed by d . catalinae ; the system of d . catalinae and its preys ; morphology comparison between d . catalinae and its competitor serangium japonicum chapin ; biology , ecology and predation of s . japonicum ; and also the interspecies competition between d . catalinae and s . japonicum . 1 . besides whitefly pests , d . catalinae could also feed on two species of alternative preys : tetranychus nr
  Fijiensis和桃蚜myzuspersicae ( sulzer ) ，并在实验室条件下，以自然猎物烟粉虱bemisiatabaci为对照，研究了替代猎物对小黑瓢虫的发育、存活、繁殖及对实验种群增长的综合影响，结果表明： ( 1 )小黑瓢虫以蚜虫为猎物时，成虫不会产卵，但可延长成虫的寿命；以红蜘蛛为猎物时，成虫可产卵并可完成整个世代。
• When feeding on t . nr . fijiensis , the beetle could oviposit and also finish its life history , without significant difference in the adult longevity compared with those feeding on its natural prey , but with longer developmental duration and higher mortality in each stage than those feeding on natural prey
  ( 4 )与自然猎物烟粉虱相比，小黑瓢虫取食替代猎物红蜘蛛的各虫态历期及世代历期延长，世代死亡率提高，产卵前期延长，总产卵量及平均每雌每天产卵量减少，而两者之间的性比、产卵率、产卵期、及雌虫寿命无显著差异。
• The relationship among searching efficiency ( e ) , the prey density ( n ) and the adult ladybird density ( p ) was simulated as e = 0 . 3 1 10 / ( 0 . 7842 + 0 . 000404 n + 0 . 21 58 p ) by beddington ' s model e = at / [ 1 + athn + btw ( p - 1 ) ] , i . e . the searching efficiency declined when the adult ladybird and the prey densities increased . in the single predator - two preys system , the selective predation of the adult female beetle to both eggs of b . tabaci and t . nr . fijiensis was discussed when two preys coexisted
  当两种猎物共存时，在不同总猎物密度下，测定了捕食者对各猎物的喜好性和转换行为，分析了两种猎物共存时，小黑瓢虫雌成虫对各猎物的功能反应形式，结果表明:当两种猎物共存时，小黑瓢虫雌成虫对烟粉虱卵在低密度下不表现喜好性，而在中等密度和高密度下表现正喜好性，对红蜘蛛卵在各密度下均不表现喜好性;对烟粉虱卵的转换效应会由于总猎物密度的不同而呈现不同的效应，而对红蜘蛛卵则在各总猎物密度下均呈现负转换效应。