Abstract
Investigation of the repellent and insecticidal effects of 8 kinds of herb extracts (chives, dokudami, eucalyptus, lavender, peppermint, cherry sage, sweet pepper and tansy) against wingless green peach aphids were conducted in laboratory and field test. In laboratory repellent tests, 20 aphids were placed between a radish leaf and filter paper for 16 h and aphids on radish leaf were calculated. In laboratory insecticide tests, 20 aphids were placed on a radish leaf treated with herb extract, and live aphids were counted after 16 h. In field tests, the number of aphids that propagated on radish leaves treated with each herb extract was assessed every 3 days. In the laboratory, dokudami, tansy and sweet pepper extracts repelled aphids, while chives, sweet pepper and tansy extracts killed them. In particular, sweet pepper and tansy extracts proved to be a potent insecticide against aphids. In the field test, the results found that extracts from dokudami, cherry sage and lavender had repellent effect on aphids. In particular, dokudami extract was a highly effective repellent against aphids. These findings suggest that dokudami extract can be used to control wingless green peach aphids in the field.
Highlights
IntroductionThe intensive use of chemical pesticides and fertilizers has resulted in environmental pollution, adverse effects on human health, natural biological control disruption and pesticide resistant increase, As consumer concerns in the safety of food and agricultural products has risen in recent years, producers are increasingly focused on pesticide-free and organic farming that satisfied the need of human health and the environment protection
The results found that extracts from dokudami, cherry sage and lavender had repellent effect on aphids
The intensive use of chemical pesticides and fertilizers has resulted in environmental pollution, adverse effects on human health, natural biological control disruption and pesticide resistant increase, As consumer concerns in the safety of food and agricultural products has risen in recent years, producers are increasingly focused on pesticide-free and organic farming that satisfied the need of human health and the environment protection
Summary
The intensive use of chemical pesticides and fertilizers has resulted in environmental pollution, adverse effects on human health, natural biological control disruption and pesticide resistant increase, As consumer concerns in the safety of food and agricultural products has risen in recent years, producers are increasingly focused on pesticide-free and organic farming that satisfied the need of human health and the environment protection. In Japan, about 600 agricultural pesticides have been included in the Positive List since its introduction in 2006. This list details the maximum limits of chemical residues permissible in food products. The wingless green peach aphid (Myzus persicae Sulzer) is a major polyphagous pest, infecting about 100 plant species and transmitting a multitude of viral diseases worldwide, including those of solanaceae, fabaceae and brassicaceae (Feng and Isman, 1995; Hori, 1998). Hori (1999c) suggests that polyphagous aphids such as M. persicae have a tendency to locate their host plants medium mainly by visual cue, avoiding the odors of some non-host plants. The olfactory behavior of aphids against host plant odors is related to host proximity
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
