ORIGINAL ARTICLE
The integration between Trichogramma evanescens West. (Hymenoptera: Trichogrammatidae) and selected bioinsecticides for controlling the potato tuber moth Phthorimaea operculella (Zell.) (Lepidoptera: Gelechiidae) of stored potatoes
1
Department of Plant Protection, Faculty of Agriculture
Suez Canal University, 41522 Ismailia, Egypt
Corresponding author
Awad Ahmed Sarhan
Department of Plant Protection, Faculty of Agriculture Suez Canal University, 41522 Ismailia, Egypt
Department of Plant Protection, Faculty of Agriculture Suez Canal University, 41522 Ismailia, Egypt
Journal of Plant Protection Research 2012;52(1):40-46
KEYWORDS
TOPICS
ABSTRACT
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
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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