Effects of fertilization and herbicides on growth of young loblolly pine and infestations of Nantucket pine tip moth（Lepidoptera： Tortricidae）

A 2-year-old pine plantation was selected to receive treatments of fertilizers and herbicides to evaluate effects on Nantucket pine tip moth infestations and the tree growth parameters of height, diameter and volume increment. Nitrogen and phosphorus fertilizers, and hexazinone and sulfometuron methyl herbicides were used in creating six treatments： （i） control; （ii） phosphorus; （iii） nitrogen and phosphorus; （iv） phosphorus and herbicide; （v） nitrogen, phosphorus and herbicide; and （vi） herbicide. Treatments were applied in 1987 and 1988. In 1987, trees treated with nitrogen, phosphorus and herbicide had significantly greater height, diameter and volume growth than trees not receiving fertilizer treatments, but did not have significantly higher tip moth infestations than control trees. Treatments receiving phosphorus only had much lower tip moth infestation rates than other treatments except nitrogen and phosphorus. In 1988, tip moth infestations were uniformly low, with no differences in treatment effects observed.

松树梢果蛾类害虫研究进展

松树梢果蛾类是松林和松树种子园的重要害虫。本文综述了这类害虫的种类、寄主范围与分布、发生危害特点、天敌资源等方面的研究进展,并对进一步研究提出展望。

刍议湘潭县松梢螟的发生与防治

本文分析了湘潭县近几年来发生松梢螟危害的主要原因,并结合近几年对松梢螟的综合治理实践,提出了"越冬代剪梢防治、越冬代灯光诱杀成虫、1～2代初龄幼虫化学防治和生物防治"等综合治理措施。

松梢螟幼虫人工饲养基质的研究

【目的】以松梢螟幼虫人工饲养基质为研究对象,对其人工饲养基质的筛选进行研究。【方法】于2015年4月-6月,在贵州省都匀市马鞍山马尾松种子园基地采集试验虫种松梢螟幼虫,并在实验室使用人工培养基进行饲养,分别按照1个天然饲料对照4个不等量的松针粉梯度的人工饲料配比,通过在人工气候箱中饲养观察记录,每个梯度设置5次重复,实验过程中,对培养基的厚度、体长、头宽、蛹长、蛹宽进行测量,记录蛹重、化蛹率及成活率。【结果】通过对比5组成活率、化蛹率,可以得出化蛹率:II>I>III=V>IV,成活率:II>IV>V=III>I。方案II饲养的松梢螟幼虫的成活率相对较高为90%,化蛹率相对较高为80%。松梢螟体重与幼虫的生长发育状况有关,幼虫的生长发育状况又与人工饲料的松针粉量的配比有关。人工饲料配方中配方Ⅱ和配方Ⅲ饲养效果相对较好,成活率分别为88%、75%,化蛹率分别为70%、50%。在幼虫成活率、化蛹率方面,4种人工饲料配方均不存在显著差异,在体长平均增量、体重平均增量方面均存在显著差异。【结论】方案Ⅱ最为适宜室内人工饲养松梢螟幼虫。