Abstract
To study the influence of complex formulation of �WoFengKang� compound microbial community and bio-organic fertilizer on allelopathic effect of cucumber fusarium wilt and field growth traits, in this experiment, different indoor treatments were taken to cultivate cucumber fusarium wilt using soil leaching liquor and Cucumis sativus growth index, fusarium wilt disease index were determined, so that allelopathic control effect of different dosages of compound microbial community on cucumber fusarium wilt can be investigated. The results showed that: compared with conventional CK, cucumber fusarium wilt cultured in different soil leaching liquor had smaller diameter. Where, colony diameter in treatment 3 was the smallest, which was 36.72 mm. Compound microbial community had certain allelopathic effect on cucumber fusarium wilt, and inhibition effect was shown with allelopathic effect reaching 27.13~43.91%. The above differently-treated soil was loaded to seedling-raising pot for Cucumis sativus planting. Cucumber fusarium wilt (FOC) was inoculated in the rough leaf stage of Cucumis sativus, thus reducing the disease index of cucumber fusarium wilt with obvious control effect reaching 55.94~72.63%. Where, treatment 3 demonstrated the best effect and allelopathic control effect reached 72.63% after 15d inoculation. The complex formulation of the two promoted vegetative growth of Cucumis sativus, lowered node of the first female flower bud, increased the number of female flowers within 30 nodes, so that 3.25d early flowering and 4.75d delayed seedling raising were achieved. Therefore, application of microbial community amid and after Cucumis sativus field planting has certain allelopathic control effect on cucumber fusarium wilt, which can effectively reduce the incidence of cucumber fusarium wilt and provide a scientific basis for the allelopathic prevention and control of soil-borne diseases in Cucumis sativus.
Highlights
IntroductionA soil-borne disease with serious hazard in Cucumber production and cultivation, is difficult to control
Cucumber fusarium wilt, a soil-borne disease with serious hazard in Cucumber production and cultivation, is difficult to control
The colony diameter of cucumber fusarium wilt cultured by ethanol extract with different complex formulations of compound microbial community and bio-organic fertilizer (Figure 1)
Summary
A soil-borne disease with serious hazard in Cucumber production and cultivation, is difficult to control. There has been no effective control method yet. Chemical pesticides are mainly used for its prevention and control in production of Cucumber. The control effect is poor and environmental pollution and pesticide residues are easy occurrences [1, 2]. Compound microbial community is one or several kinds of beneficial fungus that can move freely in the soil or serve as epiphyte in the plant rhizosphere, root surface, stems and leaves, etc., which can promote plant growth. Allelopathic effect means favorable or unfavorable effect of metabolic secretions of plant (or including microorganisms) on other plants (including microorganisms) in the environment [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
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