共查询到17条相似文献,搜索用时 46 毫秒
1.
2.
3.
近年革命圣地西柏坡柏树林内双条杉天牛危害较重,为有效地控制该虫危害,进行了管氏肿蜂防治该虫的试验,结果表明此法效果显著,即能避免环境污染又省工省时。 相似文献
4.
Pyemotes sp. and Scleroderma guani were used to control the larvae of Semanotus bifasciatus. The results as follows: (1) the suitable control time of Pyemotes sp.was from early April to early May. The reason was that in this time, the larvae of S. bifasciatus were young and not bored into xylem that was so easy to be parasitized by Pyemotes sp. With the parasitic rate 80% in average. Indoor experiment showed that the Pyemotes sp. had the same tropism selection to every instar for the host, but the parasitic rate was higher in low instar than other instars.(2)Using Scleroderma guani to control S. bjfasciatus, the suitable time was from mid May to mid June, the optimal ratio of host and parasite was 1∶ 1. Indoor experiment showed that Scleroderma guani had strong tropism toward middle-aged and elder larvae, the parasite linger around them and choose suitable position on hosts where they could lay eggs successfully. This behavior showed that Scleroderma guani had strict selectivity for their hosts. In experiment, the authors found a phenomenon that in one trap wood, both the Pyemotes sp. and Scleroderma guani could be found at the same time, they themselves did not affect each other and otherwise they could increase the parasitic rate for host. So, the authors suggested that in practice to control pests especially for boring pests, the Scleroderma guani and Pyemotes sp could be used at the same time. 相似文献
5.
6.
应用管氏肿腿蜂防治青杨天牛 总被引:3,自引:0,他引:3
在镇赉县大岗机械林场、莫莫格机械林场、建平乡、镇赉镇的杨树纯林中,采用逐棵释放、间隔一棵释放、间隔二棵释放、隔行间隔一棵释放4种方法释放管氏肿腿蜂防治青杨天牛,平均寄生率为19.56%,总体效果不理想。其中,逐棵释放效果好于其它释放方法,隔行间隔释放效果最差。 相似文献
7.
8.
管氏肿腿蜂人工繁殖及在防治栗山天牛中的应用 总被引:3,自引:0,他引:3
利用天敌昆虫防治森林害虫是一种安全、有效的防治方法。文中论述了管氏肿腿蜂的繁殖技术以及在防治栗山天牛中的试验效果,研究表明,管氏肿腿蜂对栗山天牛幼虫有较高的寄生率,平均寄生率达36.6%。管氏肿腿蜂对不同径级柞树中的栗山天牛均有寄生,径级26cm以上者寄生率较高,达38.1%。 相似文献
9.
10.
管氏肿腿蜂防治锈斑楔天牛试验初报 总被引:3,自引:0,他引:3
锈斑楔天牛是危害杨树的主要害虫之一。利用管氏肿腿蜂对锈斑楔天牛进行了防治,结果表明:6月上旬,每天9~11时和15~17时放蜂效果最好;放蜂量按虫与蜂比例为1:2为宜。 相似文献
11.
12.
13.
通过对双条杉天牛Semanotus bifasciatus Motschulsky发生期预测预报研究,掌握了该虫成虫出孔期、产卵期、羽化期以及卵孵化期、化蛹期等,为准确预报与防治该虫提供了科学依据. 相似文献
14.
15.
16.