Prey preference of Nesidiocoris tenuis on Ephestia kuehniella and Tuta absoluta eggs under laboratory conditions
عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران
نویسندگان
seyed Hassan - Malkeshi؛ Reza Talaei-Hassanloui؛ Jafar - Mohaghagh Nashabori؛ Hossein Allahyari؛ Hassan - Malkeshi
چکیده
Prey preference of the predatory bug, Nesidiocoris tenuis, was determined on Ephestia kuehniella and Tuta absoluta eggs on the basis of factorial experiments based on completely randomized design and t- test design under laboratory conditions. Results of the predation rate test indicated that the predation of the female predatory bug on the Ephestia kuehniella eggs and Tuta absoluta eggs were 58 ± 4.83 and 77.50 ± 4.83, respectively, showing a significant difference (P < 0.01) between them. In the prey preference test, the preying of the female predatory bug on the E. kuehniella eggs and the T. absoluta eggs were 41.3 ± 3.63 and 29.8 ± 3.20 respectively. The Manly’s preference indices (𝛽) of the E. kuehniella eggs (prey I) and the T. absoluta eggs (prey II) were 0.64 ± 0.07 and 0.36 ± 0.07, respectively, which demonstrated that the predatory bug more preferred the E. kuehniella eggs than the T. absoluta eggs. Both tests were repeated for the male predatory bug in similar conditions. In the predation rate test, the results from the preying of the male predatory bug on the E. kuehniella eggs and the T. absoluta eggs were 27.50 ± 4.83 and 61.44±5.09, respectively, showing a significant difference (P < 0.01) between them. In the prey-preference test, consumption of the male predatory bug from the E. kuehniella eggs was 14.33 ± 1.53 and from the T. absoluta eggs was 20.33 ± 2.39. In this experiment, the Manly’s preference indices (𝛽) of the E. kuehniella eggs (prey I) and the T. absoluta eggs (prey II) were 0.38 ± 0.02 and 0.62 ± 0.02, respectively. According to our data, the male predatory bug preferred the T. absoluta eggs more than the E. kuehniella eggs. Therefore, based on the Manly’s preference indices (𝛽), females of N. tenuis more preferred E. kuehniella eggs to provide their dietary requirements for fecundity. In conclusion E. kuehniella eggs can be used as an alternative food in tomato greenhouses, when the mean prey is insufficient or scarce.
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