论文部分内容阅读
研究了辽宁省清原县大孤家子落叶松种子园的昆虫群落和优势种群构成，结果表明：落叶松种子园有昆虫１７８种（１２目，７６科）。其中植食性昆虫１０９种，以落叶松为营养的有３２种，肉食性昆虫４８种，其他２１种。昆虫来源有栽培地土壤中和残株上原有的种类，由周围林木和植物上迁移扩散而来的种类和临时飞来和着落的种类。列出了以落叶松为中心的食物链。由于种子园母树株行距大，光照充足，适于喜光性虫种的生存繁殖；化学防治的筛选使隐蔽性害虫得以保留，暴露性虫种受到淘汰，从而逐渐形成优势种群。主要有落叶松稀球果花蝇，黑胸球果花蝇、落叶松实小卷蛾、落叶松鞘蛾和松皮小郑蛾等５种，是影响树木生长和种子收成的主要害虫，应注意监测和防治
The insect community and predominant population structure of Larix gmelinii seed orchard in Qingyuan County of Liaoning Province were studied. The results showed that there were 178 species (12 orders and 76 families) of insects in Larch Seed Orchard. Among them, there are 109 species of herbivorous insects, 32 species of which are larch nutritious, 48 species of carnivorous insects and 21 others. Insect sources include cultivated land-borne and remnant species, species that migrate from surrounding trees and plants, and species that temporarily fly and land. Lists the food chain centered on larches. Due to the large spacing between the parent trees of the seed orchard and adequate illumination, it is suitable for the survival and reproduction of the hippophae rhamnoides species. Screening for chemical control results in the concealed pests being retained and the exposed insects being eliminated, thereby gradually forming the dominant population. Mainly larch Lalium flies, black broom flies, larch moth, larch sheath moss and pine small moth and other five species, is the main impact on tree growth and seed harvest pests should be Pay attention to monitoring and prevention