陕西洛南烟区根结线虫病原鉴定及生物制剂防效评价

为解决当前洛南烟区根结线虫病为害严重问题,本研究在发病区取样、分离和形态鉴定,并根据病原种类开展了小区药效试验,对不同药剂的防治效果进行了评价。结果表明,洛南烟区的根结线虫种类主要是南方根结线虫(Meloidogyne incognita (Kofold & White) Chitwood);线虫1号菌剂、淡紫紫孢微生物菌剂和噻唑膦对根结线虫都有一定的防效,且联合用药效果好于单一用药;其中,线虫1号菌剂 + 淡紫紫孢微生物菌剂 + 噻唑膦颗粒剂联合使用对根结线虫的防效最好。In order to solve the serious problem of root-knot nematode disease in Luonan tobacco-growing area, the species of root-knot nematode were sampled from the affected area and identified based on morphological characteristics, the field plot trial was employed in reaction to the etiology, and the control effects of different agents were evaluated. The results showed that the root-knot nematode species of Luonan tobacco-growing area is Meloidogyne incognita (Kofold & White) Chitwood. Nematode No. 1 bactericide, purpura uvula microbial bactericide and phosphine thiazole granules are effective in treatment of the root-knot nematode, and the combined effect is better than single drug. Among them, the combination of Nematode No. 1 bactericide + purpura uvula microbial bactericide + phosphine thiazole granules showed the best control effect on root-knot nematode.

宝天曼自然保护区蝴蝶群落多样性与区系分析

利用蝴蝶对环境变化特别敏感的特性,研究河南宝天曼国家级自然保护区生境局部特征变化对蝴蝶多样性的影响,运用标准化样线监测法对宝天曼漂流水库、七星潭、葛条爬、长岭头、马山口等地区进行蝴蝶多样性调查.结果显示:宝天曼自然保护区物种丰富度最高的类群为蛱蝶科Nymphalidae,为当地优势类群,共24属52种;弄蝶科Hesperiidae为稀有类群,仅4属5种.5条样线中,葛条爬属级、种级多样性指数和物种丰富度最高,依次为2.7613、2.9268、7.7715,优势度指数最低,为0.1879;七星潭科级多样性指数最高,为1.4042;而长岭头的均匀度指数最高,为0.7518.保护区内的蝴蝶古北种、东洋种和广布种所占比例分别为:20.48%、13.25%、66.27%,广布种占绝对的优势,古北种多于东洋种.