CAJ | 학술논문

在田间系统调查的基础上，研究了春甘蓝田小菜蛾及主要捕食性天敌的时空生态位。结果表明，小菜蛾的时间生态位宽度较小而空间生态位宽度相对较大，说明小菜蛾种群的发生有高峰期明显和全株为害的特点。小菜蛾的时间动态、空间生态位宽度与种群密度无显著相关性，说明小菜蛾对甘蓝的为害情况比较复杂。田间调查共记录捕食性天敌13种，主要优势种依次为草间钻头蛛、七星瓢虫、血色高亮腹蛛、八斑鞘腹蛛、四点高亮腹蛛和三突花蛛。主要捕食性天敌中，七星瓢虫和三突花蛛与小菜蛾的时空二维生态位重叠度最大，其次为四点高亮腹蛛和血色高亮腹蛛，八斑鞘腹蛛和草间钻头蛛最小。这表明七星瓢虫和三突花蛛对小菜蛾有较好的跟随和潜在控制作用。
재전간계통조사적기출상，연구료춘감람전소채아급주요포식성천활적시공생태위。결과표명，소채아적시간생태위관도교소이공간생태위관도상대교대，설명소채아충군적발생유고봉기명현화전주위해적특점。소채아적시간동태、공간생태위관도여충군밀도무현저상관성，설명소채아대감람적위해정황비교복잡。전간조사공기록포식성천활13충，주요우세충의차위초간찬두주、칠성표충、혈색고량복주、팔반초복주、사점고량복주화삼돌화주。주요포식성천활중，칠성표충화삼돌화주여소채아적시공이유생태위중첩도최대，기차위사점고량복주화혈색고량복주，팔반초복주화초간찬두주최소。저표명칠성표충화삼돌화주대소채아유교호적근수화잠재공제작용。
Based on a systematic field investigation,the temporal and spatial niches of the diamondback moth (DBM), Plutella xylostella (Linnaeus)and major predatory enemies in spring cabbage fields were studied.The results showed that the diamondback moth had a narrow temporal niche breadth and a relative wide spatial niche breadth.This implied that the incidence of the diamondback moth had the characteristics of obvious peak-period and whole-plant damage.The tem-poral and spatial niche breadths of DBM had no significant relativity to its own population densities and this implied that the damage of DBM to cabbage was complicated.Thirteen species of predatory enemies were recorded in the field inves-tigation and the major species were Hylyphantes graminicola ,Coccinella septempunctata ,Hypsosinga sanguinea ,Coleoso-ma octomaculatum ,Hypsosinga pygmaea and Misumenops tricuspidatus .Among the major predatory enemies,C .sep-tempunctata and M.tricuspidatus had the biggest temporal×spatial niche overlap with DBM,followed by H .pygmaea and H .sanguinea ,while C .octomaculatum and H .graminicola had the least overlap.This indicated that C .septem-punctata and M.tricuspidatus had better potential for control of the DBM than the other predators.