Compatibility of insecticides and fungicides for the control of whorl maggot, Hydrellia philippina Ferino and rice blast, Pyricularia oryzae

Field experiments conducted during 2007 indicated that flubendiamide and spinosad were effective against whorl maggot with 11.04 and 12.38 percent damaged leaves as compared to 24.0 percent in the untreated control. Similarly during 2008, the leaf damage by whorl maggot was 8.98% in flubendiamide treated plots and 8.20% in spinosad treated plots as against 23.07% in untreated control. The whorl maggot damage in fungicidal treatments viz. isoprothiolane and carpropanid was 17.47 and 21.00% respectively and at par with untreated control (23.07% DL). Fungicides viz., isoprothiolane and carpropamid significantly reduced the leaf blast severity to the tune of 4.74 and 4.06 percent, respectively during 2007. Similar trend was also observed during 2008. The reduction in percent leaf blast severity was highly significant in fungicide and insecticidal combinations.