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期刊论文
在我国发现的根结线虫病原菌及其用作生物防治的探讨
微生物学报,33(4):313~316,-0001,():
The paper reports an obligate parasite of some plant-parasitic nematodes-Bacillus penetrans, which was found to be new to China. The optical microphotographes and scan-ning electronic microphotographes of the spores of this kind of bacteria were taken, and the symptom of the infected larvae and females of rootknot nematodes were also described. The infection rates of B. penetrans in a number of plants in Xiamen were investigated and the tests of inoculation of the spores were conducted. The results indicate that Pratylenchus sp. and the larvae of N. incognita, M. javanica, M. arenaria, M. hapla and M. fujianensis are easily infected with spores of B. penetrans, and the latter has been found to be new record of the host-nematode of this kind of.bacteria, while the larvae of Heterodera cacti and Rotylenchulus reniformis are not be infected. The infected larvae decrease their activity and even will die. The bodies of the infected females are full of spores and can not produce egg. Therefore, it is hopeful that B. penetrans will get plant nematodes under control. Among 3 species of root-knot nematodes parasitizing 16 species of host plants investi-gated, only the females of both M. incognita parasitizing Hibiscus schizopetalus, Solanum nigrum, and S. melongena and M. javanica parasitizing Achyranthes aspera have the spores of this kind of bacteria. There are only few B. penetrans in the nature according as they have been searched out only in 4.9% of 1529 females of all plants investigated (1.8% of 390 females of crops). Therefore, the authors think that the biological control of root-knot nematodes will become practical only after finding a way out of a difficulty of the mass production of the spores of this superparasite.
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