الفهرس 
Nebraska varietyOnly 14 pages are availabe for public view
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Abstract
This work was conducted in a private farm and greenhouse located at the
province of Shebin Elkom , Elmenoufia Governorate , Egypt, during 2012 , 2013,
2014 years. Four varieties of Common bean, Phaseolus vulgaris L. were
cultivated at two plantations one in winter and the other at spring season for two
successive years.
The research points:
1- Effect of different biofertilizers on three piercing sucking pests:
The effect of different bio-fertilizers ; organic fertilizers ; compost ;
NPK in comparison with check treatment on the population density of aphid ,
aphid gosspyii , white fly , Bemisia tabaci attacking , and the two spotted
spider mite , Tetranychus urticae was studied along ten weeks for two years.
1.1. Bemisia tabaci:
- Nebraska variety: Results in the first year of study reported the presence of
white fly as sedentary and movable stages on the four varieties along the study
period. Least numbers of population densities was recorded at Phosphoren
followed by Nitrobein and compost (8.2, 9.2 stage/5 leaf) (8.3, 10.1 stage/5
leaf) (10, 10.2 stage/5 leaf) comparison with (without treatment) (20.6, 22.5
stage/5 leaf) in plantation 1, 2 respectively. On the other hand, as for field
experiments least numbers of population densities was recorded at Phosphoren
followed by Nitrobein and compost comparison with (without treatment)
(17.1,18.8 stage/5 leaf) (20.8,22.4 stage/5 leaf) (21.6, 22.5 stage/5 leaf)
(33.7,36.5 stage/5 leaf) in 1,2 plantation respectively.