The density of Bemisia tabaci adult occurred on cucumber, horse-weed, red been, thistle and tomato in organic tomato greenhouse was high on horse-weed leaf.
In case of olfactory cues at different plants carried out in dark room test, the attraction rate of B. tabaci adult to cucumber and egg-plant ...
The density of Bemisia tabaci adult occurred on cucumber, horse-weed, red been, thistle and tomato in organic tomato greenhouse was high on horse-weed leaf.
In case of olfactory cues at different plants carried out in dark room test, the attraction rate of B. tabaci adult to cucumber and egg-plant were higher than sweetpepper, chrysanthemum and tomato at 28.6% and 32.9% respectively but there wasn’t sinificant difference with 8 beans. In case of olfactory cues using Y-tube olfactometer, B. tabaci adult prefered more egg-plant and cucumber than other plants(chrysanthemum, sweetpepper and tomato), and horse-weed attracted B. tabaci adult more than other plants(cuccumber, egg-plant and tomato), but there wasn’t a great difference(the difference in statistics was recognized).
In case of visual cues at different plants(horse-weed, cucumber and egg-plant that B. tabaci adult prefered in olfactometer test), B. tabaci adult prefered cucumber(29.8% in dark and 44.3% in light) and egg-plant(35.8% in dark and 35.6% in light) in dark room test and light room test, and difference of attraction rate was more great in light room test. Also in comparison by tomato, cucumber(82.5%) and egg-plant(82.3%) attracted B. tabaci adults further more than horse-weed(33.5%).
B. tabaci female survived longer on egg-plant(27.9 days) and fecundity was higher(106 eggs per day) than other plants(sweetpepper, chrysanthemum, cucumber and tomato). Also the emergence rate of pupae on egg-plant(89.2%) was higher. Developmental periods of B. tabaci from egg to 4th instar on horse-weed leaf were shorter than cucumber and tomato in the whole temperature (20, 25 and 30 ℃) generally.
In laboratory, the egg-plant attracted 401.6 adults and the tomato 47.4 when 500 adults of B. tabaci were released in cage. in tomato fields, the density of B. tabaci adult on 0 point(egg-plant was placed) was a little higher than other point(5, 10 and 15 m from egg-plant) in farmer’s field. In case of CNARES’s fields, the variation of denstiy of B. tabaci adult was similar to that in farmer’s field but the density on 5 m point was declined on the contrast later.
Oius laevigatus, natural enemy of thrips was about 75.5 B. tabaci 4th instars but in case of prefernce test prefered F. occidentalis instead of B. tabaci. Amblyseius swirskii among other predatory mites (Neoseiulus californicus, Neoseiulus cucumeris amd Neoseiulus barkeri) was good predator of B. tabaci. A. swirskii on egg-plant and tomato leaf preyed on 11.6 and 10.4 eggs of B. tabaci per day.
The mortality of B. tabaci adults was the highest when denotefuran SG 50% was irrigated on egg-plant(trap plant for B. tabaci adult) 2 days after and in comparison with other systemic chemicals(cyantraniliprole EC 5%, pyridaben WP 20% and clothianidin SC 5%).
The density of Bemisia tabaci adult occurred on cucumber, horse-weed, red been, thistle and tomato in organic tomato greenhouse was high on horse-weed leaf.
In case of olfactory cues at different plants carried out in dark room test, the attraction rate of B. tabaci adult to cucumber and egg-plant were higher than sweetpepper, chrysanthemum and tomato at 28.6% and 32.9% respectively but there wasn’t sinificant difference with 8 beans. In case of olfactory cues using Y-tube olfactometer, B. tabaci adult prefered more egg-plant and cucumber than other plants(chrysanthemum, sweetpepper and tomato), and horse-weed attracted B. tabaci adult more than other plants(cuccumber, egg-plant and tomato), but there wasn’t a great difference(the difference in statistics was recognized).
In case of visual cues at different plants(horse-weed, cucumber and egg-plant that B. tabaci adult prefered in olfactometer test), B. tabaci adult prefered cucumber(29.8% in dark and 44.3% in light) and egg-plant(35.8% in dark and 35.6% in light) in dark room test and light room test, and difference of attraction rate was more great in light room test. Also in comparison by tomato, cucumber(82.5%) and egg-plant(82.3%) attracted B. tabaci adults further more than horse-weed(33.5%).
B. tabaci female survived longer on egg-plant(27.9 days) and fecundity was higher(106 eggs per day) than other plants(sweetpepper, chrysanthemum, cucumber and tomato). Also the emergence rate of pupae on egg-plant(89.2%) was higher. Developmental periods of B. tabaci from egg to 4th instar on horse-weed leaf were shorter than cucumber and tomato in the whole temperature (20, 25 and 30 ℃) generally.
In laboratory, the egg-plant attracted 401.6 adults and the tomato 47.4 when 500 adults of B. tabaci were released in cage. in tomato fields, the density of B. tabaci adult on 0 point(egg-plant was placed) was a little higher than other point(5, 10 and 15 m from egg-plant) in farmer’s field. In case of CNARES’s fields, the variation of denstiy of B. tabaci adult was similar to that in farmer’s field but the density on 5 m point was declined on the contrast later.
Oius laevigatus, natural enemy of thrips was about 75.5 B. tabaci 4th instars but in case of prefernce test prefered F. occidentalis instead of B. tabaci. Amblyseius swirskii among other predatory mites (Neoseiulus californicus, Neoseiulus cucumeris amd Neoseiulus barkeri) was good predator of B. tabaci. A. swirskii on egg-plant and tomato leaf preyed on 11.6 and 10.4 eggs of B. tabaci per day.
The mortality of B. tabaci adults was the highest when denotefuran SG 50% was irrigated on egg-plant(trap plant for B. tabaci adult) 2 days after and in comparison with other systemic chemicals(cyantraniliprole EC 5%, pyridaben WP 20% and clothianidin SC 5%).
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