Temperature dependence of the functional response of the common green lacewing, Chrysoperla carnea on the black citrus aphid, Toxoptera aurantii and the green citrus aphid, Aphis spiraecola

Amir Hossein Toorani | Jalil Eshaghi Sani | Habib Abbasipour | Behnam Amiri | Saeid Heydari

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URL :   http://research.shahed.ac.ir/WSR/WebPages/Report/PaperView.aspx?PaperID=54003
Date :  2017/09/02
Publish in :    2nd Iranian International Congress of Entomology


Keywords :dependence, black, citrus, aphid, aurantii, citrus, aphid, Aphis

Abstract :

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Common green lacewing, Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae) is one of the most important natural enemies of pests. Functional response study is an important criterion for the selection of natural enemies for application in biological control programs. With respect to role and importance of temperature in creating a successful biological control, in this study, the functional response of 2nd and 3rd larval instars of C. carnea feeding on A. spiraecola and T. aueantii aphids was evaluated at three different temperatures. An experiment was conducted at three constant temperatures of 20, 25 and 30 °C, 75 ± 5 relative humidity and 16L: 8D hr photoperiods. To study the functional response, different densities of 2, 4, 8, 16, 32, 64, and 128 bait insect were used. To determine the type of functional response and estimation of parameters of attack rate (a) and handling time (Th), the two step technique of Juliano in SAS software was used. In evaluation of the functional response of 2nd and 3rd larval instars of C. carnea on nymphs of T. aueantii aphid, functional response curve of 3rd larval instar at 25oC and 2nd larval instar at 20 and 30oC were of type II. Also in temperatures 20 and 30oC for 3rd instar larvae and at 25oC for 2nd instar larvae, curve was of type III. With increasing temperature from 20 to 30oC, the handling time was significantly decreased for the both 2nd and 3rd instar larvae. Functional response type feeding on A. spiraecola aphid at 20 and 25oC was obtained as type II, however, at 30oC it was type III. Also no significant differences were observed in the parameters of attack rate and handling time in the mentioned three temperatures. According to the obtained results in this study, it seems that 2nd and 3rd larval instars of C. carnea at 30 °C, can have more effective role in controlling black and green citrus aphids.