POPULATION DYNAMICS OF TOMATO PIN WORM, TUTA ABSOLUTA MEYRICK (LEPIDOPTERA: GELECHIIDAE) AND SURVEY OF ASSOCIATED NATURAL ENEMIES ON TOMATO IN FAYOUM GOVERNORATE

Document Type : Research articles.

Authors

Plant Protection Department, Faculty of Agriculture, Fayoum University

Abstract

The present work was carried out at Experimental Farm, Fac.
of Agric., Fayoum Univ. and aimed to shad some a light on population
fluctuations of the tomato pinworm, T. absoluta and its associated
natural enemies and relation to some weather factors at Fayoum
Governorate on tomato crop (Solanum lycopersicum L.) cultivated in
four successive plantations during 2011/12 and 2012/13
seasons.Natural enemies associated with T. absoluta were the predator
( Atheta sp.) and 3 parasitiod hymenopteran insect species (Bracon sp,
Halticoptera sp and Apanteles sp). The entomopatogenous bacteria
Bacillus sp (Bacillales: Bacillaceae) was also isolated from dead and
moribund larvae.
In summer plantations, no larvae were observed on leaves and
fruits during all season 2011. However, during the second summer
season of 2012, slight infestations were recorded on tomato leaves
during the farmer 4 weeks of the season and no infestations were
observed on the fruits.
In winter plantation: in 2011/12 the population fluctuated
slightly from Nov. 2011until end of Feb 2012, one period activity was
recorded from end of Feb until end of April. Fruits infestations began
to appear from end of April extended to end of plantation. While in
2012/13, few larvae began to appear at mid Nov 2012, increased
gradually during the successive weeks to arrive its highest on leaves at
end of Feb 2013 (peak of 681 larvae /20 leaves). Fruit infestation
increased slightly during the successive weeks of fruiting to arrive the
highest count of larvae during the first week of March 2013 (214
larvae /20 fruits).

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Fayoum Journal of Agricultural Research and Development
Volume 28, Issue 1
January 2014
Pages 148-155

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