Development and reproduction of the greenhouse whitefly, Trialeurodes vaporariorum, and the sweetpotato whitefly, Bemisia tabaci, were investigated under different temperatures. Duration of the development from egg to pre-adult of the whiteflies were measured under four temperature ranges from 16℃ t...
Development and reproduction of the greenhouse whitefly, Trialeurodes vaporariorum, and the sweetpotato whitefly, Bemisia tabaci, were investigated under different temperatures. Duration of the development from egg to pre-adult of the whiteflies were measured under four temperature ranges from 16℃ to 30℃. The developmental velocity of greenhouse whiteflies were faster than the sweetpotato whitefly at lower temperature of 16℃ and 20℃, while at higher temperature of 25℃ and 30℃, sweetpotato whitefly was faster. Developmental zero point and total effective temperature for the development of egg and nymph, and for the complete development from egg to emergence were higher in the greenhouse whitefly then sweetpotato whitefly. For longevities, fecundity, mortality and host-preference were similar in both of the greenhouse and the sweetpotato whitefly. Active flight and dispersion were most active during the mid day (from 10 to 2pm) in both of the white fly, however, the greenhouse whitefly was caught mainly on trap at the upper position while the sweetpotato whitefly was at the lower position. The characteristics and effects of acetamiprid from controlled-release (CR) formulations was investigated in using three wax matrix granule types. Three CR formulations were composed of mineral, acetamiprid technical, wax and talc. The wax in three CR formulations was in the proportion of 2(2-WMG), 10(10-WMG) and 25%(25-WMG) to regulate release rate of active ingredients into 25, 50 and 75% respectively. All compounds using wax matrix granule were effective against the greenhouse and the sweetpotato whitefly on the tomato. Especially, the effect was better as time passed. Against green peach aphids, Myzus persicae, on the red pepper, all were effective, but 2 and 10-WMG were harmful to the plant. The toxicities of acetamiprid, acetamiprid+etofenprox and etofenprox insecticides were investigated to the greenhouse and the sweetpotato whitefly. Insecticide activities were evaluated by testing systemic action and residual effect in the laboratory, and control efficacy in the pots and greenhouse. The insecticides that showed over 90% of larvicidal and adulticidal activity were acetamiprid and acetamiprid+etofenprox. In all insecticides, residual activity was better than systemis. In the control efficacy test on two species, effectiv control values were obtained at 11th day after treatment of acetamiprid and acetamiprid+etofenprox.
Development and reproduction of the greenhouse whitefly, Trialeurodes vaporariorum, and the sweetpotato whitefly, Bemisia tabaci, were investigated under different temperatures. Duration of the development from egg to pre-adult of the whiteflies were measured under four temperature ranges from 16℃ to 30℃. The developmental velocity of greenhouse whiteflies were faster than the sweetpotato whitefly at lower temperature of 16℃ and 20℃, while at higher temperature of 25℃ and 30℃, sweetpotato whitefly was faster. Developmental zero point and total effective temperature for the development of egg and nymph, and for the complete development from egg to emergence were higher in the greenhouse whitefly then sweetpotato whitefly. For longevities, fecundity, mortality and host-preference were similar in both of the greenhouse and the sweetpotato whitefly. Active flight and dispersion were most active during the mid day (from 10 to 2pm) in both of the white fly, however, the greenhouse whitefly was caught mainly on trap at the upper position while the sweetpotato whitefly was at the lower position. The characteristics and effects of acetamiprid from controlled-release (CR) formulations was investigated in using three wax matrix granule types. Three CR formulations were composed of mineral, acetamiprid technical, wax and talc. The wax in three CR formulations was in the proportion of 2(2-WMG), 10(10-WMG) and 25%(25-WMG) to regulate release rate of active ingredients into 25, 50 and 75% respectively. All compounds using wax matrix granule were effective against the greenhouse and the sweetpotato whitefly on the tomato. Especially, the effect was better as time passed. Against green peach aphids, Myzus persicae, on the red pepper, all were effective, but 2 and 10-WMG were harmful to the plant. The toxicities of acetamiprid, acetamiprid+etofenprox and etofenprox insecticides were investigated to the greenhouse and the sweetpotato whitefly. Insecticide activities were evaluated by testing systemic action and residual effect in the laboratory, and control efficacy in the pots and greenhouse. The insecticides that showed over 90% of larvicidal and adulticidal activity were acetamiprid and acetamiprid+etofenprox. In all insecticides, residual activity was better than systemis. In the control efficacy test on two species, effectiv control values were obtained at 11th day after treatment of acetamiprid and acetamiprid+etofenprox.
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#온실가루이 담배가루이 Acetamiprid
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