Abstract
This study aimed to evaluate the effect of menthol oil, camphor oil and their mixture against the green leafhopper, Empoasca decipiens Paoli (Hemiptera: Cicadellidae) in laboratory and estimation of LC90 to apply it under semi-field condition. The results showed that the mixture of the two oils was more effective than each essential plant oil alone where LC50 was 37.86 ppm while it was 182.34 ppm and 242.80 ppm for menthol oil and camphor oil, respectively. LC90 values were 463.12 ppm, 962.36 ppm and 1128.05 ppm for the mixture, menthol oil, and camphor oil, respectively. When LC90 was applied in the semi-field experiment, also the mixture of camphor and menthol oil was the most effective than each plant oil alone which recorded 50% mortality while menthol oil recorded 41.03 % and camphor oil recorded 35.90%.
Highlights
The green leafhopper, E. decipiens is one of the most important economic hemipterans pests infest a wide range host of plants caused serious damage whether directly or indirectly
The aim of this study was to determine the effect of menthol oil, camphor oil and their mixture against the green leafhopper, E. decipiens in the laboratory and application of LC90 on it under semi-field conditions
The Plant Oils: Both menthol and camphor oil extracts were bought from Essential oil Extracts Center, National Research Center
Summary
The green leafhopper, E. decipiens is one of the most important economic hemipterans pests infest a wide range host of plants caused serious damage whether directly or indirectly. They feed by piercing plant tissue and penetrating the phloem with needle-like mouthparts. The insect injects toxic substances in plant tissues, that interfere with plant physiology (Sakthivel et al, 2011). This species is an efficient vector of several important virus diseases. Several investigators recorded the role of some leafhopper species in transmitting the pathogens of plant diseases (Nielson, 1968). The fauna of this species was studied in Egypt in the field of vegetable crops and fruit trees (Awadalla et al, 2011; Shalaby et al, 2012; Awadalla et al, 2013 and 2014)
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