The Population of Aphis Gossypii Glove on the Black Grape by the Method of Direct Account

Abstract

A field study was conducted in Yathrib province Salahuddin government to study determination of population of  Aphis gossypii on black grapes by using the method of direct account for upper , medium and lower parts of the plant were chosen  (40 plants ) at randomize  from one of the fields , counting had done for one plant only .Results of the study showed that the highest population density was in May ( 22.8 ) adult / tree insect , and lowest  population was in June ( 9.7 ) adult / tree insect , statistical analysis showed significantly differences , while the results showed that the upper layer from plant was more effectiveof infection by ( 23.7 ) adult forupper layer ,( 17.4 ) adult in medium layer and ( 12.5 ) adult in lower layer plant , the statistical analysis showed significant differences between the three layers of the plant.

Keywords: adult insect ,Aphids gossypii , population , black grapes