1株生防芽孢桿菌對黃瓜根結(jié)線蟲的防治、促生作用及其鑒定
[Abstract]:A strain of Bacillus spp. KN1 isolated from rhizosphere soil of greenhouse cucumber was used for fermentation culture. The control effect of KN1 strain on cucumber root knot nematode disease and its growth promoting ability were studied in greenhouse. The strain was identified by molecular biology. The results showed that the decrease rate and control effect of nematodes treated with KN1 were 48.2% and 41.5% respectively, which was comparable to that of 10% thiazophos granules alone in greenhouse pot experiment for 60 days. The results showed that the root knot formation could be reduced significantly. The effect of KN1 bacteria dipping with 10% thiazophos granules was better. The nematode reduction rate and the control effect were 71.5% and 57.27% respectively. The fresh weight of cucumber plants treated with KN1 dipping roots increased by 30.33% and 70.89% respectively compared with the control without inoculation. Based on the phylogenetic analysis of 16s r DNA, the results showed that the strain KN1 belonged to Bacillus thuringiensis (Bacillus thuringiensis), and the serovar konkukian sequence of Bacillus thuringiensis was 99.55.According to the culture characteristics of Bacillus thuringiensis, It was identified as Bacillus thuringiensis by morphological characteristics. The identification of strain KN1 and the control effect of cucumber in greenhouse provided basis for studying its biological control mechanism and development and application.
【作者單位】: 金正大生態(tài)工程集團(tuán)股份有限公司/養(yǎng)分資源高效開發(fā)與綜合利用國家質(zhì)量重點實驗室;
【基金】:山東省科技質(zhì)量大專項(新興產(chǎn)業(yè))(編號:2015ZDXX0502B02)
【分類號】:S436.421;S476.1
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