Efficacy of a new botanical pesticide, salpipest, on the elm aphid, Tinocallis platani (Kaltenbach) (Hemiptera: Aphididae)
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عنوان دوره: سومین کنگره بین المللی حشره شناسی ایران
نویسندگان
1Green Area Research, Education and Advisory center, District 20, Tehran Municipality, Tehran, Iran
2Green Area Research, Education and Advisory center, District 11, Tehran Municipality, Tehran, Iran,
3Green Area Research, Education and Advisory center, District 20, Tehran Municipality, Tehran, Iran,
چکیده
The elm aphid, Tinocallis platani (Kaltenbach) is one of the most important pests in the urban green spaces that its damage is severely important on the elm trees. Currently, the general method to control the pest is using the chemical pesticides, which may cause resistance of the elm aphid to many common insecticides. In addition, the indiscriminate usage of insecticides has led to damage to the natural enemies of the aphids. Therefore, use of safe and biocompatible botanical pesticides is very noticeable. Salpipest (EC 20%) is a biocompatible botanical pesticide that is recommended to control white fly, Trialeurodes vaporariorum Westwood (Hemiptera: Aleurodidae) which is manufactured by Nano Green Tooba Company. In this study, contact toxicity of salpipest, salpipest + volk oil (0.025%) and salpipest + volk oil (0.05%) was investigated on the second instar nymph of T. platani. After a preliminary test to determine 20 and 80 percent mortality, the appropriate concentrations were evaluated by logarithmic distance. The lethal effect of Salpipest was examined using the dipping method and then the mortality was recorded 24 h after treatment. The experiment was performed at a standard environmental condition (25 ± 1 ºC, 70 ± 5% RH and 16:8 h L:D). Also, control treatments were considered at the same conditions with water and volk oil. Probit analysis demonstrated that the lethal concentration to cause 50% mortality (LC50) and their 95% confident limits of salpipest, salpipest + volk oil (0.025%) and salpipest + volk oil (0.05%) were evaluated 110.90 (88.58-136.54), 3.76 (3.40-4.15) and 3.16 (2.20-7.65) ppm, respectively. According to the results, the toxicity of salpipest + volk oil (0.025%) and salpipest + volk oil (0.05%) were significantly higher compared to that of salpipest. However, no significant differences were found between salpipest + volk oil (0.025%) and salpipest + volk oil (0.05%). Hence, the present results indicate that salpipest + volk oil is a suitable botanical pesticide to control the elm aphid. However, further assessments are needed to determine the toxicity effect of salpipest on T. platani in the urban spaces.
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