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首页> 外文期刊>Journal of Biological Control >Bio-Management of Fusarium Wilt Disease Complex with?Pseudomonas fluorescens?and?Aspergillus niger
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Bio-Management of Fusarium Wilt Disease Complex with?Pseudomonas fluorescens?and?Aspergillus niger

机译：荧光假单胞菌和黑曲霉对镰刀菌枯萎病复合物的生物管理

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摘要

Flue Cured Virginia (FCV) tobacco is a major rain-fed crop grown in light soil regions of Karnataka. Fusarium wilt disease complex caused by?Fusarium oxysporum?f. sp.?nicotianae?in association with Root-knot nematodes,?Meloidogyne incognita?is a major threat to the successful production and also for its sustainability in the region. The tobacco crop affected with above malady exhibit stunted growth, severe wilt symptoms, drying of leaves on one side of the plant and with conspicuous galls on the infected roots resulted in heavy yield and quality loss. Fungicides and nematicides are being used against this wilt disease complex with limited efficacy. Extensive use of pesticides of chemical origin especially in higher doses for disaese control has to be avoided due to higher costs and associated hazards to the environment. Replicated trials were conducted with antagonistic bacterium,?Pseudomonas fluorescens?and antagonistic fungi,?Aspergillus niger?singly and in combinations against fusarium wilt disease complex in FCV tobacco under sick field conditions. Results revealed that application of?P. fluorescens?@ 1g/plant in combination with?A. niger?enriched with FYM @ 100 g /plant at the time of planting resulted in 61.0% reduction in fusarium wilt disease incidence at 70 DAT compared to untreated check. There was significant reduction in root knot nematode incidence in terms of RKI (Root- Knot Index) to 1.93 and final soil nematode population to 72.5 as compared to RKI of 3.71 and final soil nematode population of 140 in untreated check. Subsequent increase in total cured leaf and bright grade yield was 1311 kg/ha and 926 kg/ha respectively as compared to 1042 kg/ha and 615 kg/ha respectively in untreated check.
机译：弗吉尼亚烤烟（FCV）烟草是在卡纳塔克邦轻土壤地区种植的主要雨养作物。尖孢镰刀菌引起的枯萎病综合症f。根结线虫，与根结线虫结合，是对成功生产及其在该地区可持续发展的主要威胁。受到上述病害影响的烟草作物生长发育迟缓，严重的枯萎症状，植物一侧的叶子变干以及受感染的根部上有明显的胆汁，导致大量产量和质量下降。杀菌剂和杀线虫剂对这种枯萎病复合物的功效有限。由于较高的成本和对环境的危害，必须避免广泛使用化学来源的农药，尤其是为控制疾病而大剂量使用。在病地条件下，分别对拮抗细菌，荧光假单胞菌和拮抗真菌，黑曲霉进行了重复试验。结果表明应用？P。荧光素@ 1g /植物与A组合。与未处理的对照相比，在种植时以100 g /株的FYM富集的尼日尔使70 DAT的枯萎病发病率降低了61.0％。在未经处理的检查中，根结线虫的根结线虫发病率显着降低，RKI（根结指数）降至1.93，最终土壤线虫种群降至72.5，相比之下，RKI为3.71，最终土壤线虫种群为140。与未处理的对照中分别为1042 kg / ha和615 kg / ha相比，随后的总固化叶和亮品级产量分别增加了1311 kg / ha和926 kg / ha。

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