INTEGRATED USE OF FUNGICIDE, PLANT EXTRACT AND BIO-AGENTFOR MANAGEMENT OF ALTERNARIA BLIGHT DISEASE OF RADISH(Raphanus sativus L.) AND QUALITY SEED PRODUCTION

Research in: Agricultural & Veterinary Sciences

article

M. Nazmul Arefin¹  M. K. A. Bhuiyan¹  M. Tanbir Rubayet¹ 

[1] Department of Plant Pathology, Faculty of Agriculture, Bangabandhu Sheikh Mujibur Rahman Agricultural University

关键词: Alternaria blight;    T. harzianum;    Rovral 50WP;    Neem leaf extract;    Seed yield of Radish;   

来源: Jomard Publishing

【 摘 要 】

An attempt was taken to evaluate integrated management of Alternaria blight disease of radishvariety BARI Mula-1 and quality seeds production in Bangladesh. Before setting the field experiment, invitro and in-vivo assays were laid out to select the virulent isolate AB-2 of Alternaria brassicae,antagonistic bio-agent Trichoderma harzianum isolate T-2, Neem (Azadirachta indica) leaf extract andRovral 50WP (Iprodione) fungicide. The virulent isolateAB-2 of A. brassicae spore suspensions (5105spores ml-1) was sprayed for inoculation purpose of radish field with micro-sprayer prior to flowering at50 days after sowing (DAS). Bio-agent, T. harzianum isolate T-2 was used as soil amendment with wheatbran substrate (@ 90 gm-2), seed treatment (@ 3 g Kg-1) and also foliar spray (@ 5105spores ml-1) at 3times after 3 days of inoculation with A. brassiceae. Rovral 50WP was used as seed treatment @ 2.5 gKg-1 seed. About 200 ppm conc. fungicide ((Iprodione) and 10% conc. Neem (Azadirachta indica) leafextract was also used as foliar spry for 4 times at 10 days interval starting from flowering stage. Thehighest reduction of disease severity on leaf, siliqua and prevalence of A. brassicae on seeds (19.40, 15.40and 10.00%) and increased seed yield and germination (160.96% and 85.45%) was observed in thetreatment T8 followed by T7, T5 and T6, respectively. On the contrary, the lowest reduction of diseaseseverity on leaf, siliqua and prevalence of A. brassicae on seeds (69.80, 62.20 and 43.22%) and decreasedseed yield and germination (12.72% and 53.00%) was observed in the treatment T2 followed by T1. Theintensification of seed yield was not only because of the reduction of diseases but also it might be due toaddition of the bio-agent in the soil as a result, increases the number of soluble nutrients and provoke tosecret the different growth promoting substances.

【 授权许可】

Unknown