Field evaluation of insecticides and fungicides for the control of whorl maggot, Hydrellia philippina and rice blast, Pyricularia grisea

摘要

Field experiments conducted to evaluate efficacy of insecticides viz.,flubendiamide RIL038 20WDG, spinosad 45 and fungicides viz., isoprothiolane, tricyclazole alone and in tank mix combinations for the control of whorl maggot, Hydrellia philippina and rice blast, Pyricularia grisea. Flubendiamide and spinosad were effective against whorl maggot with 4.5 and 4.2 mean percent damaged leaves as compared to 13.9 percent in the untreated control. The whorl maggot damage in fungicidal treatments viz. isoprothiolane and tricyclazole was 7.9 and 8.7%, respectively. Fungicides viz., isoprothiolane and tricyclazole significantly reduced the neck blast incidence to the tune of 20.6 and 19.8 percent, respectively as compared to 66.6 percent in untreated control. The neck blast incidence declined further in tank mix combinations of fungicide and insecticide varying between 10.4 and 17.5 percent. The whorl maggot damage in combination treatments was also significantly at par with damage in sole insecticidal treatments.