Pulvinaria tenuiva/vata (NEWSTEAO) AND ITS NATURAL ENEMIES ON RATOON SUGARCANE IN DAKAHLIA GOVERNORATE

Document Type : Original Article

Authors

1 Faculty of Agriculture, Mansoura University, Mansoura

2 Economic Entomology Department

3 Microbiology Department

Abstract

This work presents the first report about the incidence of the sugarcane scale
insect, Pulvinaria tenuivalvata Newstead, in the three different regions of 0 akahlia
Governorate, Talkha, Mit Gammr, and Dikenis. The experiments were carried out
during 2001 and 2002 sugarcane growing seasons in these regions. The results
indicate that P. tenuivalvata was active throughout July in both seasons until harvest
in November. Regarding its natural enemies. only aphelinid parasitoid, Cocophagous
scutel/aris Dalman, the two predatory insects, Scymnus syriacus and Paederus alfierii
and certain entomopathogenic fungi were recorded. The role of the aphe\inid
parasitoid and P. alfierii were highly significant biotic factors in 2001 & 2002 growing
seasons, followed by S. syriacus and the entomopathogenic fungi. The influence of
weather factors on P. tenuivalvata population density was also discussed.

Keywords

Journal of Plant Protection and Pathology
Volume 28, Issue 7
July 2003
Pages 5699-5712

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