Control of Wilt Complex in Brinjal Using Chemical, Microbial, Soil Amendments and Integrated Management

Abstract

Wilt in brinjal has become more damaging in the red lateritic soil of Jharkhand due to the prevalence of Fusarium oxysporum and Ralstonia solanacearum making it wilt complex disease. Out of six organic amendments tested soil application of neem cake (5q/ha) proved to be the most effective treatment to minimize wilt incidence (26.3%) and increased fruit yield (19.23 kg/plot). Among the five fungicides viz; carbendazim, mancozeb, tricyclazole, blitox, oxathiin and streptocycline, seedling dip with mancozeb (2.5g/l) was most effective and showed least wilt incidence (24.21%) with highest fruit yield (21.59 kg/ plot) which was significantly at par with blitox-50. Among four bioagents viz; Trichoderma viride (TvD) Delhi isolate, Trichoderma harzianum Ranchi isolate(ThR), Trichoderma harzianum (ThD) Delhi isolate and Pseudomonas fluorescens Delhi (PfD) isolate soil application of precolonized ThD proved to be most effective in reducing wilt severity (16.15%) and highest fruit yield (24.79 kg/plot)were recorded. In the integrated approach of chemicals with bioagents and organic amendments under field condition among all the combinations, minimum wilt incidence (20.34%) was recorded in neem cake precolonized with ThD + seedling dip in copper oxychloride (0.3%). This treatment also provided the highest fruit yield (24.97 kg).

Organic and Conventional Bean Pesticides in Development of Autochthonous Trichoderma Strains

“…Banik and Pérez-de-Luque [ 50 ] observed that a T. harzianum isolate had more sporulation in the presence of Copper. In other research, Lal et al [ 51 ] observed that eggplant seedlings immersed in a solution with oxychloride-dipped Copper and neem cake colonized with T. harzianum minimized the wilt incidence compared to some fungicides or BCA used separately. However, in our study, all autochthonous Trichoderma strains were affected in their growth by the presence of Copper oxide, which was a contrary result to that observed in other studies where sporulation of some Trichoderma strains was not affected by this compound [ 32 , 52 ].…”