Isolation and Identification of Multifunction Bio-control Agent Fusarium against Orobanche cernua

doi:10.16409/j.cnki.2095-039x.2016.06.017

Abstract

Abstract: Twenty Fusarium strains were isolated from the diseased Orobanche cernua in Zhangjiakou District, Hebei Province. Safety analysis with the root immersion and inoculation method demonstrated that four strains were relatively safe and had evident growth-promoting effect on the tested crops and vegetables (wheat, maize, cotton, sunflower, tomato, tobacco, pepper, eggplant, watermelon, melon). Among all the four strains, strain Br-2 had significant effect on promoting the growth of tobacco, pepper and watermelon, and it also had the best control effect to O. cernua:The plant height of tobacco, pepper and watermelon increased 123.53%, 62.16% and 28.95%, respectively, after applying strain Br-2. The fermentation supernatant of strain Br-2 could inhibit seed germination of O. cernua by 71.79%. In plot experiments, the parasitic rate of strain Br-2 to O. cernua was 50% and the parasitic degree was 79.38% in field trials.

Key words: Orobanche cernua, biological control, Fusarium, identification

CLC Number:

S476

WANG Yajiao, JI Lijing, LI Qiusheng, WANG Liansheng, XIAO Ying, KONG Lingxiao. Isolation and Identification of Multifunction Bio-control Agent Fusarium against Orobanche cernua[J]. journal1, 2016, 32(6): 788-793.

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