Abundance of leaf miner and some piercing sap sucking pests on some bean(Phaseolus vulgaris l.) Varieties

Document Type : Original Article


Plant protection research inistitute, A.R.C., Dokki-Giza, Egypt


The field experiment was conducted during summer and winter seasons to
evaluate seven varieties of beans (Phaseolus vulgaris L.) for their relative
susceptibility against some sap sucking pests Tetranychus urticae Koch, Bemisia
tabaci (Gennadieu), Aphis craccivora Koch, Thrips tabaci Lindquist and leaf miner,
Liriomyza trifolii (Burgess). The tested bean varieties were: Medina (V1), R9251 (V2),
Teresa (V3), Luvalde (V4), Al-Hanna (V5), Alexandria (V6) and Excalibur (V7). None
of the varieties escaped the infestation of all these pests. Generally the population of
T. urticae and T. tabaci were higher in summer than in winter, while population of B.
tabaci and L. trifolii were higher in winter. Relative susceptibility of bean plants
changed according to plantation season as, V6, V6, V5, V6 and V3 hosted the less
number of T. urticae, B. tabaci, A. craccivora, T. tabaci and L. trifolii in winter
season, respectively. While in summer plantation, V5, V1, V4, V1 and V7 hosted the
less number of the same pests, respectively.