Bacterium pesticide composition containing carboxylic acid amide and benzamide bactericides and biocontrol bacteria, preparation and application

Abstract

The invention discloses bacterium pesticide composition containing carboxylic acid amide and benzamide bactericides and biocontrol bacteria, a preparation and application and belongs to the fields of plant protection and pesticide science. The bacterium pesticide composition comprises, by mass, 1-10 parts of carboxylic acid amide bactericides, 1-10 parts of benzamide bactericides and 1-10 parts of biocontrol bacterium powder, wherein the viable count in the bacterium powder is not lower than 106cfu/g. Preferably, the biocontrol bacteria are bacillus amyloliquefaciens ZY-9-13 with the preservation number being CGMCC No. 6162. The bacterium pesticide composition has the advantages that the carboxylic acid amide bactericides can inhibit the cell wall cellulose synthesizing of pathogenic oomycetes, benzamide fluopicolide achieves a sterilizing effect through spectrin acting on cell membranes, zoxamide brings the bactericidal activity into play by inhibiting the assembling of pathogenic bacterium mitochondria beta-tubulin, and the two types of bactericides are coordinated with the bacillus amyloliquefaciens to achieve an excellent preventing and treating effect on tobacco root knot nematode disease and tobacco black shank.

Description

technical field [0001] The invention relates to a fungicide composition containing carboxylic acid amides, benzamide fungicides and biocontrol bacteria, as well as a preparation and application of the fungicide composition, belonging to the fields of plant protection and pesticide science. Background technique [0002] Tobacco black shank (Tobacco black shank) is a worldwide devastating soil-borne disease, and its pathogen is Phytophthora parasitica var nicotianae (Breda de Hann) Tuker]. Phytophthora nicotianae can infect tobacco plants from the seedling stage to the adult plant stage, mainly infecting tobacco stems, and can also infect leaves. Tobacco black shank forms water-soaked black spots at the base of the stem, the cortical tissue becomes black and depressed, and spreads up and down along the stem, and the pith is dark brown and necrotic and shrinks into a disc shape (Wan Weixiao, He Xiaobing, Qu Pingzhi, et al. .Tobacco black shank early prevention technology[J].Pl...

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Problems solved by technology

For example, the combination of yellow blue-shaped bacteria and manganese zinc can control wheat scab (Mao Xueqin, Peng Zhirong, Qiu Haiping, etc. Fermentation conditions of biocontrol strain MT-06 and the control effect of compound fungicides on wheat scab[ J]. Zhejiang Agricultural Sciences, 2013 (07): 821-824), the combination of Bacillus subtilis and tebuconazole can prevent and treat broad bean wilt (Chen Zhiyi, Ren Haiying, Liu Yongfeng, etc. Tebuconazole and Bacillus subtilis synergistically control broad bean Fusarium wilt and its synergistic mechanism [J]. Journal of Pesticide Science, 2002 (4): 40-44), Bacillus subtilis, difenoconazole, azoxystrobin, etc. can control apple ring spot (Zhou Han .Coordinated control of postharvest ring blight by fungicides and biocontrol bacteria and its mechanism[D].Anhui Agricultural University, 2009), Jinggangmycin and Bacillus subtilis synergistically control rice sheath blight (Chen Zhiyi, Liu Yongfeng, Lu Fan. Jinggangmycin and biocontrol bacteria Bs-916 synergistic disease control and synergistic mechanism[J]. Plant Protection Journal, 2003, 30(4):429-434.), etc., but the control target of the combination of the above bacteria and drugs Phytophthora nicotae

The invention patent with the publication number CN104381303A discloses a fungal drug composition for preventing and treating fungal diseases, which is composed of riboflavin and Bacillus subtilis Tpb55 bacterial powder according to the mass ratio of 1.21~2.34:97.96~98.79. Applying Bacillus subtilis Tpb55 bacterial powder, the bacterial drug composition can significantly improve the control effect of tobacco black shank, red spot disease and other diseases, and enhance the disease resistance of plants, but it can only achieve the same control effect as chemical agents

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