EFFECT OF PHASEOLUS' PLANTATION DATES ON THE POPULATION DENSITIES OF CERTAIN SUCKING PESTS

Hady,, S. A.; EI-Bessomy,, M. A. E.; Omar,, H. I. H.

doi:10.21608/jppp.2004.239995

EFFECT OF PHASEOLUS' PLANTATION DATES ON THE POPULATION DENSITIES OF CERTAIN SUCKING PESTS

Document Type : Original Article

Authors

Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt.

10.21608/jppp.2004.239995

Abstract

Three Planting dates of Phaseolus plant "Phaseo/us vu/garis" (L.) were
tested for summer and fall plantation (Mid of February ,Mid of March and Mid of April)
and (Mid of July ,Mid of August and Mid of September) throughout tow successive
years (2001 & 2002) in Giza Governorate on different stages of the whitefly
Bemisia tabaci (Genn.) and the common red spider mite Tetranychus urticae (Koch)
as a cultural practices management . The obtained data of summer plantation
revealed that there were non-significant effects of the tested planting dates on both
Pests . In the summer plantation the early planting date showed that the least
infestation of whitefly and common red spider mite was-at the Mid of February and the
highest was at the Mid of April. This may be refered to the increase of temperature
and relative humidity. In fall plantation the early planting date showed that the least
infestation of whitefly for the three developmental stages at the Mid of July and the
highest was at the Mid of September but the population of the common red spider
mite was disappeared after Mid of July.