Genetic diversity of Acyrthosiphon pisum (green form) from differentgeographical populations Effects of continuous UV-B stress on biological characteristics of green pea aphid Effect of temperature on development and fecundity of pyridaben resistant and susceptible populations of Tetranychus truncates Ehara (Acari: Tetranychidae) Effects of different leek cultivars on the growth, development and fecundity of Bradysia difformis Frey