Efficacy of novel acaricide molecules and botanicals against rice leaf mite Oligonychus oryzae (Hirst) (Prostigmata: Tetranychidae)
Keywords:
Bioassay, Oligonychus oryzae, Novel acaricides, BotanicalsAbstract
Laboratory bioassay was conducted to evaluate the relative toxicity of four new acaricide molecules viz., fenazaquin 10 EC, spiromesifen 240 SC, fenpyroximate 5SC and propargite 57SC, two botanicals, azadirachtin 0.005 per cent and neem oil 2 per cent and wettable sulphur along with a standard check dicofol 18.5 EC against rice leaf mite,Oligonychus oryzae. Fenazaquin was found to be the most effective molecule which recorded 100 per cent mortality of gravid females 24h after treatment application. It recorded an egg mortality of 86.60 per cent at 72 h. At 72h, spiromesifen recorded 80 per cent egg mortality and 100 per cent mortality of gravid females. Propargite recorded a mortality of 83.30 per cent of eggs and 90 per cent of gravid females. Efficacy of fenpyroximate though found to be superior over standard check, dicofol, was found to be inferior to other novel molecules and on par with wettable sulphur. The efficacy of botanicals was found to be inferior to standard check, dicofol.align="justify">Downloads
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