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Effect of different kairomonal sources on the performance of Eretmocerus sp. near furuhashii against Bemisia tabaci on cucumber: II - In greenhouse

100%

Mandour N. S., Ren S., Qiu B., Wackers F.

Journal of Plant Protection Research

2007

tom 47

nr 3

289-298

The effects of application of an artificial honeydew mixture of glucose, fructose and trehalose (GFT), honey and Bemisia tabaci nymph-extract as kairomonal sources in enhancing the foraging efficiency and performance of Eretmocerus sp. near furuhashii on cucumber plants were studied. Experiments were conducted in small greenhouses (4x3*3 m) using life table methods. Life table data indicated that the total mortality in B. tabaci immature cohorts in all treatments was in the order of fourth instar > first instar > second = third > egg > pupa cohorts. The tested kairomonal materials had a significant effect on the rate of parasitism (p > 0.0415) with 13.23, 9.04 and 10.54% higher than that of control in artificial honeydew of GFT, nymph-extract and honey treatments, respectively. B. tabaci egg/adult survival ratio was also significantly affected (p > 0.0001) by the tested kairomonal sources being lowest (22.91%) in nymph-extract treatment. Moreover, the tested kairomonal materials arrested significantly more parasitoids to colonize the treated plants comparing to control. Apparently, the tested materials were significantly effective in attracting the parasitoids up to 3 days after applications then significant difference was not found between treatments.

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The integration between Trichogramma evanescens west. (Hymenoptera: Trichogrammatide) and selected bioinsecticides for controlling the potato tuber moth Phthorimaea operculella (Zell.) (Lepidoptera: Gelechiidae) of stored potatoes

100%

Mandour N. S., Sarhan A. A., Atwa D. H.

Journal of Plant Protection Research

2012

tom 52

nr 1

The efficacy of the egg-egg parasitoid Trichogramma evanescens (Hymenoptera: Trichogrammatidae) and certain bioinsecticides (e.g., Neemix, Virotecto, Agerin, Dipel 2x and Spinosad) for controlling the potato tuber moth (PTM), Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) under storage conditions was studied. Single and combined treatments of T. evanescens and the bioinsecticides were tested. Neemix and spinosad were evaluated as spray treatments. Virotecto, Agerin and Dipel 2x were evaluated as dust and spray treatments. Data were recorded in terms of rate of infestation, reduction of infestation, number of P. operculella pupae, and number of mines per 20 tubers as well as percentage of edible parts. Data revealed that the percentage of infestation in the control treatment was as high as in the Neemix treatment being 96.67 and 90% after one and two months of storage, respectively. Obviously, Spinosad and Dipel 2x were the most effective bioinsecticides in reducing tuber infestation and number of P. operculella recovered pupae. Virotecto and Agerin reduced rate of infestation and number of recovered P. operculella pupae over that of the control, but their effect was significantly lower than that of Spinosad or Dipel 2x. Moreover, there were significant differences among treatments in the form of the number of P. operculella tunnels and percentages of edible parts after two months in storage. Data further indicated that the integration between the tested bioinsecticides and T. evanescens enhanced the control of P. operculella. Significant differences in percentages of infestation, edible parts, number of recovered pupae as well as number of mines in stored potatoes existed between individual treatments (without Trichogramma) and combined treatments.

Ograniczanie wyników

2 Journal of Plant Protection Research

2 Mandour N. S.

1 Atwa D. H.

1 Qiu B.

1 Ren S.

1 Sarhan A. A.

1 Wackers F.

1 2012

1 2007

Wyniki wyszukiwania

Effect of different kairomonal sources on the performance of Eretmocerus sp. near furuhashii against Bemisia tabaci on cucumber: II - In greenhouse

The integration between Trichogramma evanescens west. (Hymenoptera: Trichogrammatide) and selected bioinsecticides for controlling the potato tuber moth Phthorimaea operculella (Zell.) (Lepidoptera: Gelechiidae) of stored potatoes