Studies on the efficacy of chemical and non-chemical treatments to control mycoflora associated with chilli seed

摘要

A total 19 genera and 38 species of fungi were isolated by using standard blotter and deep freezing method from chilli seeds. Of these Aspergillus flavus, A. niger, A. fumigatus, Alternaria alternata, Drechslera hawiinesis, Fusarium moniliforme, F. oxysporum and F. solani were more frequently isolated. Seed treatments with 8 fungicides viz., Metalaxyl + Mancozeb (72% w/w), Mancozeb (80% w/w Dithiocarbamate), Aliette (80% WP Fosetyle aluminium), Derosol (60% WP Carbendazim), Ridomyl Gold (68% WP), Thiophonate methyl (70% WP), Antracol (70%WP Propineb) and Copperoxychlorite (50% WP) and four seed powders of herbicides viz., asafoetida (Ferula assafoetida), black cumin (Nigella sativa), neem ( Azadirachta indica ) and mustard ( Brassica campestris) were used @ 0.5%, 0.15% & 0.25% . Out of these 8 fungicides; Ridomyl Gold @ 0.15 & 0.25% inhibited the growth of all fungi whereas asafetida and Nigella sativa powder @0.25% were found to be more efficacious however showed little fungicidal activity toward Fusarium moniliforme.