Abstract
Four products allowed in organic farming (kaolin, insecticidal soap, neem oil soap, spinosad) as alternatives to chemical insecticides, were evaluated for the control of Metopolophium dirhodum (Walker, 1849) (Hem.: Aphididae). In addition, number of the newborn nymph and host selection for the treated and untreated rose (Rosa hybrida L. cv. First Red) leaves were examined. The toxicities of used natural products were compared with the diazinon and control (water). Rose saplings were used as experimental material. The application was repeated twice in the same greenhouse. Evaluations in populations were done on 1, 3, 5, 7, 10 and 14 days after applications. Insecticidal soap showed toxicity between 50.45 % and 74.0 % until fifth day and its toxicity decreased in the following days. Neem oil soap was non-toxic (15.09%–19.71%) at first application but, in the second application, its toxicity was increased (36.96%-72.27%). Repeated kaolin application ended with a positive result of 66.87% control. Spinosad had no effect on aphid. It was observed that M. dirhodum population was decreased by repeated (twice) applications of kaolin, insecticidal soap and neem oil soap. However, they could not control the aphid populations completely. In choice tests, the numbers of living aphids and newborn nymphs on rose leaflets treated with kaolin, neem oil soap, and insecticide soap were lower than those not treated. These three products were found to be repellent for M. dirhodum.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
More From: Adnan Menderes Üniversitesi Ziraat Fakültesi Dergisi
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.