A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Kumar, J.
- Efficacy of Trichoderma viride in Controlling the Loose Smut of Wheat Caused by Ustilago segetum Var. Tritici at Multilocation
Authors
1 Directorate of Wheat Research (ICAR) Post Box No. 158, Karnal 132001, Haryana, IN
2 IARI RS, Karnal, IN
3 IARI, New Delhi, IN
4 GBPUAT, Pantnagar, IN
5 CCHHAU, Hisar, IN
6 PAU, Ludhiana, IN
Source
Journal of Biological Control, Vol 14, No 1 (2000), Pagination: 35-38Abstract
The application of Trichoderma viride on loose smut infected seeds (Ustilago segetum var. tritici) or in soil, reduced the smutted tillers up to 17.5 per cent. However, treatment of T. viride alone was not as effective as carboxin seed treatment in the control of loose smut. Maximum reduction was observed in dry seed treatment with antagonist as well as seed treatment plus soil application. The effect of T. viride was more prominent in the seed lot having lower level of loose smut infection. Application of T. viride along with half dose of carboxin was however. found as effective as full recommended dose of carboxin (2.5 g/kg of seed). Soaking of seeds in tap water for 24h also reduced tbe incidence of loose smut by 15.4 per cent.Keywords
Biocontrol, Loose Smut, Trichoderma viride, Uslilago segetumvar.Tritici..- Evaluation of Bioagents for their Compatibility in the Development of Consortium for Enhanced Efficacy
Authors
1 Department Plant Pathology, College of Agriculture, Govind Ballabh Pant University of Agriculture and Technology, Pantnagar - 263145, Uttarakhand, IN
Source
Journal of Biological Control, Vol 34, No 2 (2020), Pagination: 164-167Abstract
The concept of development of microbial consortia for bio-control relies on the fact that bioagents under natural habitats live in communities with some benefits for plants. Application of bioagents in a consortium may improve efficacy, reliability and consistency of the bioagents even under diverse soil and environmental conditions. Diversity in biocontrol mechanisms offered by each bioagent in consortium may help in enhancing disease suppressiveness and may also strengthen the capabilities of the partners in an additive or synergistic manner. Till now no guideline has been published for the evaluation of bioagents to test their compatibility before developing bioagent consortium. In the present studies compatibility among biocontrol potential Trichoderma-Pseudomonas and Trichoderma-Trichoderma isolates was studied by dual culture, mixed formulations and using cell free cultures. In dual culture all the combinations (14 no.) were found compatible with each other as no isolate inhibited the growth of one-another i.e. absence of inhibition zone. All the mixed formulations of potential Trichoderma-Pseudomonas isolates (8 no.) were found compatible with each other as they were growing simultaneously on PDA without antagonizing the growth of other or formation of inhibition zone in their combinations. The cell free cultures of each Trichoderma and Pseudomonas isolates tested with each other using Food Poison Technique showed synergistic effects on their fresh mycelial weight among some combinations while majority showed no significant differences with their checks. Further all the combinations (14 no.) were tested for their effects on seed germination and vigour index of chickpea in glasshouse. All the combinations showed significantly better seed germination while some combinations viz. Th14+Psf173, TCMS36+Psf173,Th17+Th19,Th17+Psf2,Th17+TCMS36 and Th14+Psf2 showed better plant vigour index (43.5 to 44.9% ) as compared to their checks (28.8 to 41.5%).These guidelines could be used before developing bioagent consortium and evaluation in field for crop health management.
Keywords
Chickpea, Microbial Consortia, Trichoderma harzianum, Pseudomonas fluorescens.References
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