Natural occurrence of sucking insect pests of common bean varieties, Phaseolus vulgaris L. under the field conditions at Beheira governorate

Abstract EN

These studies were carried out at El Delengat district, EL-Beheira Governorate, Egypt, in the summer and winter seasons (summer and winter plantation) of common bean plants during two successive years of 2018 and 2019.

Six sucking insect pests were recorded on common bean varieties for each season.

The cotton thrips, Thrips tabaci observed significant variation between the two plantations in each year and recorded the highest number 45.87 in summer 2019 but the lowest number was 32.25 in winter of 2018.

The cotton whitefly, Bemisia tabaci recorded the highest numbers compared with the all pests, and increased density till recorded 161.07 individual in summer 2019.

All pests recorded with the highest numbers on Npraska variety and the population increased till recorded the highest average number of 197.47 for Bemisia tabaci.

On the fact of Krnak variety, Lyriomyza spp was recorded with a few numbers but the number increased in all pests recorded the highest number in Bemisia tabaci.

On the other hand, E.

dispiens preferred Npraska variety and activation its population in summer plantation while the lowest numbers were recorded on Giza3 variety in summer plantation.

Aphis gossypii recorded with high number in summer plantation of all varieties accepted Krnok variety.

Tetranychus urticae preferred that the Npraska variety then giza6 than Krnok and giza3.