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...