Analysis of K+ release kinetics of biomass ash with different pH Effect of photoperiod on growth and development of two color morphs of pea aphid (Acyrthosiphon pisum) Effects of EGTA, verapamil and trifluoperazine on ABA, and xylem sap pH of maize seedling under drought stress Comparison of soil acid phosphatase activity determined by different methods Detoxification enzymes activities in two color morphs of pea aphid (Acyrthosiphon pisum) treated with different sub-lethal concentrations of avermectin Effect of different antibiotics on the biological characteristics of pea aphid Study on predation preference of Harmonia axyridis (Pallas) and Adonia variegata (Goeze) on red and green color morph pea aphids