Abstract:

In order to explore insecticidal activities of different solvents extracts of macadamia peel, the author used water, ethanol and ether as solvents to extract active constituent of macadamia peel, and studied insecticidal activities of different extracts to 3rd instar and 4th instar Dendrolimus kikuchii Matsumura. The results showed that: there was certain insecticidal activity of macadamia peel’s water extract, ethanol extract and ether extract to 3rd instar and 4th instar Dendrolimus kikuchii Matsumura, and the higher concentration had the stronger insecticidal activity. Insecticidal activity of macadamia peel’s ether extract to Dendrolimus kikuchii Matsumura was higher than water extract and ethanol extract on same. Mortality and corrected mortality of 3rd instar Dendrolimus kikuchii Matsumura were higher than 4th instar Dendrolimus kikuchii Matsumura in same time and same concentration stress. The Mortality and corrected mortality of Dendrolimus kikuchii Matsumura were increased with the prolonging on some concentration water extract, ethanol extract and ether extract of macadamia peel. There were different insecticidal activities of different extracts of macadamia peel, the insecticidal activities was inversely proportional to polar of extract.