Control effect of extract and compound of Acorus gramineus against Nilaparvata lugens

Key Words： Acorus gramineus, extract, compound, Nilaparvata lugens, control

Abstract：    toxicity and control effect of Acorus gramineus Soland extract, A. gramineus extract 30% EC and buprofeizin 30% EC, against Nilaparvata lugens a1 were studied. The results show that after being treated with A. gramineus extract for 48 hours, the LD₅₀ of 3rd instar and macropterous females was 0.64 μg/instar and 095 μg/adult. In an indoor potted test, a 30 times dose of A. gramineus extract 30% EC and a 50 times dose of dosage buprofeizin 30% EC showed significant control effect on the 3rd instar, achieving mortalities of 8556% and 96.67% respectively three days after treatment. A field trial showed that the control effect of a 20 times dosage of A. gramineus extract 30% EC and a 300 times dosage of extractbuprofeizin 30% EC were 78.46% and 79.76% respectively after seven days.