HOST RANGE AND SEASONAL ABUNDANCE OF THE CORN LEAF APHID, Rhopafosiphum maidis FITCH IN SHARKIA, EGYPT

Document Type : Original Article

Authors

Plant Protection Res, Institute, Dokki, Giza, Egypt

Abstract

Host range and seasonal abundance of the corn leaf aphid. Rhopa!oslp < /em>hum
maidis Fltch(CLA) was estimated at Zagazig district, sherkra Governorate during two
continues years (2001t2002and 20021'2003)
Rtvop < /em>ekistp < /em>tvurn maidis Fitch found infesting 21 plant species two as grain
crops (maize presented and wheat) ,5 species as foliage crops (millet, broom corn,
soccharia , maize and Johnson grass) and 14 species of weeds [Jungle rice, barnyard
grass, rabbit grass, green fox tail, little seed canary grass, wild oat, sugar can
(solitary plants), common reed, dog grass, annual bluegrass, rabbit foot grass, purple
nut sedge and mesa (solitary plants) ].The grain crop plants (Z, mays) harbored
relatively the highest numbers (presented with 24.46%of the total number of aphid)
followed by foliage plants (especially , Sorghum vulgure presented witn 22 21 %) and
weeds
Seasonal abundance of Rh maidis population on the different hosts indicated
that, popuratron density of CLA on foliage crop and weed plants was raised before
and after suitable growing periods of maize and wheat plants The infestation of Rh
marc.s started on the weed plants Echmochloa colonum Link, Polypogon
monspeliensis Desf and Cyperus rotundus L.) from end November till mid or end
January then aphid migrate to wheat and maize which cultivated as foliage crops the
Infestation contmuous reaching to mid April and then migrate to early summer
plantation maize (grain crop) , also the aphids migrate from Bachiana eruc.torrrus
G((sb and Setaria spp to maize (grain and foliage crops) and to soccharia (foliage
crop)
Journal of Plant Protection and Pathology
Volume 30, Issue 12
December 2005
Pages 8117-8126

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