Compound bacterium for preventing and treating tobacco phytophthora, preparation method and application thereof

Abstract

The invention relates to the technical field of plant cultivation and specifically relates to a compound bacterium for preventing and treating tobacco phytophthora, a preparation method and an application thereof. The compound bacterium for preventing and treating tobacco phytophthora is mainly prepared from the following bacteria: streptomyces microflavus, photosynthetic bacteria, nitrobacteria, nitrogen-fixing bacteria, phosphate-releasing bacteria and potassium-releasing bacteria. Streptomyces microflavus is selected as antagonistic bacteria and photosynthetic bacteria, nitrobacteria, nitrogen-fixing bacteria, phosphate-releasing bacteria and potassium-releasing bacteria are selected as nutritional functional bacteria, so that the compound bacterium for preventing and treating tobacco phytophthora, provided by the invention, has a certain antagonistic effect to the pathogenic bacteria of the tobacco phytophthora and can effectively prevent the harm of the tobacco phytophthora. The compound bacterium for preventing and treating tobacco phytophthora, provided by the invention, can be directly used for planting the plants, inoculating composts and producing bio-organic fertilizer.

Description

Technical field

[0001] The present invention relates to the technical field of plant cultivation, in particular to a composite fungus agent for preventing and curing Phytophthora tobacco and its preparation method and application. Background technique

[0002] Phytophthora is a group of important phytopathogenic bacteria, which is highly destructive and harmful to host plants. With the changes in the structure of agricultural production in my country, the massive development of fruit trees, vegetables, flowers, Chinese herbal medicines, and facility agriculture, the threat of plant diseases to agricultural production has become increasingly serious. The causative bacterium of Catharanthus blight is tobacco blight, and the temperature is 28℃ and the relative humidity of air is higher than 85%. Flowers, stems, and leaves can all be affected. The diseased part initially grows grayish-brown oily spots, and after expansion, it becomes dark brown irregular shape. Under humid condition...