荔枝园昆虫群落优势功能团的季节演变及其相关性

以功能团为研究单元,对不同处理荔枝园昆虫群落季节演变规律进行了研究.结果表明:咀嚼害虫、刺吸害虫、捕食性天敌以及中性昆虫是昆虫群落的优势功能团;两处理区各害虫、中性昆虫功能团种群数量变动基本一致;无公害区捕食性天敌数量及优势度多数月份要高于常规区,但又显著低于对照区;中性昆虫是维持捕食性天敌种群数量的主要功能团;无公害防治对害虫的防治效果与常规化学防治相当,有利于维持果园昆虫群落的稳定.

Research on the Dynamics and Relativity of Dominance Guilds of Insect Community in Litchi Orchards

This paper regarded the guild as the study unit,and researched the season dynamics of the insect community in litchi orchards under different management models.The result indicates that the chewing pest,piercing-sucking pest,predatory natural enemy and neutral insect are the dominance guilds in the insect community.The fluctuations of population quantity for pest and neutral insect guilds are basically consistent.The quantity and dominance of predatory natural enemies in harmless controlled plots are more than those in the general controlled plots during most months,but remarkably less than those in the contrast plots.The neutral insect is the main guild that keeps the stabilization of predatory natural enemies.The harmless control obtains an equal controlled effect to the general control,which favors the keeping of the stabilization of the insect community.