Elm树皮甲虫与荷兰Elm病的联合防治试验

Massimo Faccoli
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引用次数: 11

摘要

在意大利测试了联合控制新乌尔米Ophiostoma和多节Scolytus的可能性。用不同浓度的杀真菌剂和杀虫剂对两个榆树无性系(矮树×小矮树(无性系B)和嫁接到矮树×小矮树花粉(无性系A)上的光叶榆变种进行了处理。然后,迫使多孢S.multistatus的成虫在处理过的树木的树枝分叉处进食,它们要么携带两个新尺骨O.novo ulmi分离株(H328和182)的孢子,要么提供它们的天然分生孢子。48小时后,检查所有昆虫(死的或活的)。一个月后,同样的树枝被剪掉,带到实验室。从每根树枝上,三个圆盘几乎1 mm厚(0、3和6 昆虫进食点上方cm)。将木盘接种在选择性基质中并保存至O。 新乌尔米殖民地。所有含有杀虫剂的论文对多孢S.multistatus都有很好的效果。类似地,所有含有杀菌剂的论文都显示出良好的真菌控制效果,独立于分离的真菌。从携带天然分生孢子的昆虫获得的真菌传播百分比低于从人工装载的甲虫获得的百分比。甲虫的性别和在树叶上的位置都不会影响昆虫的死亡率或新尺骨虫的感染。注射多菌灵效果最好 + 克隆A中的乙酰甲胺磷混合物。高化学浓度并不能改善总体结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Elm bark beetles and Dutch Elm Disease: tests of combined control

The possibility for the combined control of Ophiostoma novo-ulmi and Scolytus multistriatus was tested in Italy. Two elm clones [U. pumila×U. minor (clone B) and U. glabra var. pendula grafted onto U. pumila×U. minor pollards (clone A)] were treated by stem injection of different blend or concentrations of fungicides and insecticides. Then, adults of S. multistriatus, either loaded with spores of two isolates of O. novo-ulmi (H328 and 182) or provided of their natural load of conidia, were forced to feed in twig crotches of the treated trees. After 48 hours all insects were checked (dead or alive). One month later, the same twigs were cut off and brought to the laboratory. From each twig, three discs almost 1 mm thick were then taken (0, 3 and 6 cm over the point where the insect fed). The wood discs were inoculated in selective substrate and stored until the development of O. novo-ulmi colonies. All thesis containing insecticides give good results against S. multistriatus. Similarly, all thesis containing fungicides show a good fungus control independently from the fungal isolated. The percentage of fungal transmission obtained from insects carrying the natural load of conidia was lower than percentages obtained from beetles artificially loaded. Both beetle sex and position on the foliage never influence insect mortality or O. novo-ulmi infection. The best results were obtained injecting the Carbendazim + Acephate blend in the clone A. High chemical concentrations did not improve the general results.

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