Bactericide composition containing chemical bactericides and biocontrol bacterium, preparation and application of bactericide composition or preparation

Abstract

The invention discloses a bactericide composition containing chemical bactericides and a biocontrol bacterium, a preparation and application of the bactericide composition or the preparation, and belongs to the field of plant protection and pesticide science. The composition comprises the chemical bactericides and biocontrol bacterium powder in a mass ratio of (1-10) to (1-10), wherein the viable count of the bacterium powder is not lower than 10<6>cfu/g; the chemical bactericides are preferably selected from carboxylic acid amide bactericides, phenylamide bactericides, benzamide bactericides, dinitroaniline bactericides and dithiocarbamate bactericides; the biocontrol bacterium is preferably bacillus amyloliquefaciens ZY-9-13, with collection number of CGMCC No.6162. The bactericide composition has excellent control effects on tobacco root knot nematode and tobacco black shank, has obviously better control effects than the singly used chemical bactericides or biocontrol bacterium, can achieve the effect of delaying chemical drug resistance and is especially suitable for controlling tobacco black shank in the field.

Description

technical field [0001] The invention relates to a fungicide composition containing a chemical fungicide and biocontrol bacteria, as well as a preparation containing the fungicide composition and its application, 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].Plant Doctor, ...

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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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