摘要
用目击法和陷井法调查了北京市巨山国营农场苹果园地面有益节肢动物的主要种类,有29种蜘蛛、7种鞘翅目、4种半翅目、1种革翅目昆虫.分析了植被对地面捕食性天敌的影响,用结扎幼虫模拟实验研究了地面捕食性天敌对桃小食心虫(Carposina niponensis Walsingham)的相对捕食作用,观察了蜘蛛类活动规律,讨论了有益节肢动物在维持果园生态平衡中的作用.
Experiments were carried out from 1989 to 1990 in apple orchard to provide scientificbasis for ground biological control of the peach fruit moth.Alfalfa Medicage sativa Linnaeusand bird rapae Brassica campertris L.were intercropped between rows of trees and comparedto uncovercropped system.There were 29 species of Spiders,7 Coleoptera,4 Hemiptera,1Dermaptera and other benificial arthropods on the ground of orchard.Spiders and Carabidswere dominant predators.Spiders accounted for 94.74% of total predators by witness and12.69% of benificial arthropods by pitfall in vestigation.There were significantly more spi-ders in multi-culture system compared with the nonculture system,but the numbers of cara-bid beetles in both treatments were similar.Significant correlation was found between spiderattacking activities on lepidopteran and spider density estimates.Larvae consumption byground predator accounted for 61.25% of tested food on covercropped treatment which was1.6 times over than that of uncovercropped.The roles of ground predators for maintainningorchard ecological balance are discussed.
出处
《果树科学》
CSCD
北大核心
1993年第3期146-149,共4页
Journal of Fruit Science
