几种生物制剂对辣椒根腐病的拮抗活性研究

Nahla I. H. El-Feky, T. Essa, A. Elzaawely, H. El-Zahaby
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引用次数: 6

摘要

从Kafr El-Sheikh省不同辣椒产地的健康辣椒根际中分离出8株生物制剂(真菌和细菌),对辣椒根腐病病原包括蛇皮霉、茄枯菌、尖孢镰刀菌、念珠菌和phaseolina进行了防治试验。在体外实验中,真菌生物制剂(绿木霉TV1和TV2)和哈茨芽孢杆菌(TH1和TH2)对5种植物病原体的抗真菌活性高于细菌生物制剂(荧光假单胞菌P1和P2)和枯草芽孢杆菌B1和B2)。在盆栽试验中,TV1和P2生物制剂在所有处理中引起的疾病严重程度最低。各生物制剂对辣椒植株的生长参数有不同程度的促进作用,特别是木霉对不同病原菌引起的根腐病有不同程度的防治作用。体外和盆栽试验与杀菌剂处理效果相当。因此,应用生物方法防治植物病害是一种有效的替代技术,并可能具有潜在的生物肥料效应,因为它们刺激了辣椒植株的生长。
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Antagonistic activity of some bioagents against root rot diseases of pepper (Capsicum annum L.)
Eight isolates of bioagents (fungal and bacterial), obtained from the rhizosphere of healthy pepper plants collected from various pepper-growing sites in Kafr El-Sheikh governorate, were tested against pepper root-rot pathogens including Pythium aphanidermatum, Fusarium solani, F. oxysporum, F. moniliformis and Macrophomina phaseolina. In in vitro study, the fungal bioagents (Trichoderma viride (TV1 and TV2) and T. harzianum (TH1 and TH2) exhibited the maximum antifungal activity against the five phytopathogens compared to the bacterial bioagents (Pseudomonas fluorescens (P1 and P2) and Bacillus subtilis (B1 and B2). In pots experiment, TV1 and P2 bioagents caused the least disease severity among all treatments. All bioagents were effective with different degrees specially Trichoderma spp. to promote the growth parameters of pepper plants and manage root rot disease that caused by different pathogens. Furthermore, they had equal efficacy with fungicide treatment under in vitro and in pots experiment. Thus, application of biological methods in plant disease control is an effective alternative technique and could have a potential biofertilizer effect, since they stimulated the growth of pepper plants.
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