The hawthorn spider mite, Amphitetranychus viennensis (Zacher), is an important tetranychid causing damage on fruittrees and woody ornamental plants. We investigated the effect of a mycoinsecticide BotaniGard® ES at different humiditylevels on the eggs and adults mortality of A. viennensis. In a laboratory condition, egg mortality was significantly influencedby the conidial concentration and RHs. Highest mortality of eggs was observed at 1×108 conidia/ml with 95% RH thanother conditions. In 1×108 conidia/ml, LT50 at 95 and 75% RH were significantly different from 55% RH. In BotaniGard®spray in cherry plants, mites decreased on day 6 at all the concentrations, but the mite populations rebounded exceptin 1×109 conidia/ml where it maintained 0 until 9 days after spraying. It is therefore concluded that B. bassiana hasa potential to be used against A. viennensis

Frankliniella occidentalis (Pergande) is an anthophilus pest of many greenhouse and field crops worldwide. We compared the influence of constant (27.3ºC) and fluctuating temperatures (23.8 to 31.5ºC, with an average of 27.3ºC) on the life table characteristics of F. occidentalis held at a 16:8 h L:D photoperiod and 45 ± 5% RH. The development times from egg to adult of F. occidentalis were significantly affected by temperature fluctuation and sex. Survival of immature life stages was higher under fluctuating than constant temperature. Total first instar larvae/female was not significantly different (58.7 at constant and 60.5 at fluctuating temperatures) but daily production of first instars was higher in constant temperature than fluctuating temperatures (3.3 at constant temperature and 3.1 at fluctuating temperatures). The off-spring sex ratio was not significantly different between constant and fluctuating temperatures. The intrinsic rate of natural increase (rm), net reproductive rate (R0), finite rate of increase (λ), mean generation time (tG), and doubling time (tD) were affected significantly by fluctuation of temperature. The intrinsic rate of natural increase of F. occidentalis was higher in constant temperature (0.1808) than did in fluctuation of temperatures (0.1733). Thus, this study show that variable temperatures influence population growth rates of F. occidentalis.

The greenhouse whitefly Trialeurodes vaporariorum (Westwood) (Hemiptera: Aleyrodidae) is a phloem-feeding pest that causes serious damages in vegetables and ornamental crops by direct feeding and causing diseases such as sooty mold. For the better management of T. vaporariorum, within-greenhouse and -plant distribution of this pest was investigated in strawberry greenhouses in Andong. Ten strawberry plants for each category were randomly selected and examined. Adults per plant was recorded by visual observation, and eggs and nymphs per trifoliate leaf were counted under microscope. Adult, egg, and nymph populations were all more abundant in border rows than in middle rows. The number of nymphs were found more in lower canopy in both border and middle rows, but egg density was higher in upper canopy of border plants. No correlation was found between sticky trap count and population density on plants. These informations would be important for the development of efficient monitoring and control measures of greenhouse whitefly.

톱다리개미허리노린재[Riptortus pedestris (Fabricius) (Hemiptera: Alydidae)]의 방제를 위해서 집합페로몬트랩이 일부 사용되고 있으나 실제 방제 효과가 있는지에 대한 연구는 드믄 편이다. 2013년 안동지역 콩 경작지에서 집합페로몬트랩의 설치시기에 따른 노린재 방제 효과에 대한 연구 중 트랩설치가 콩의 재배 후반부에 톱다리개미허리노린재 밀도를 오히려 상승시키는 것을 발견하고, 이를 실험적으로 확인하기 위해 안동대학교 시험포에서 추가 연구를 수행하였다. 본 발표에서는 그 결과를 보고하고 토론하고자 한다.

Tetranychus piercei McGregor, T. truncatus Ehara, and T. bambusae Wang and Ma are considered as major pests of many agricultural crops in Bangladesh. T. piercei and T. truncatus has a diverse host plants although T. bambusae infest only bamboo leaves. We compared the development, survivorship, and life table parameters of T. piercei and T. truncatus on bean leaves and T. bambusae on bamboo leaves at 25ºC, 60-70% RH, and a photoperiod of 16: 8 h (light: dark). The development time from egg to adult female of T. piercei and T. truncatus was 10.2 and 8.8 days when feeding on bean leaves, respectively, whereas it takes 9.5 days for female T. bambusae when feeding on Bambusa sp. leaves. Mated females of T. piercei, T. truncatus, and T. bambusae laid on average 186.9, 132.5, and 46.3 eggs for the oviposition period of 22.3, 13.5, and 20.2 days, respectively. The intrinsic rate of increase (rm) was 0.268 for T. piercei, 0.295 for T. truncatus, and 0.178 for T. bambusae. The finite rate of increase (λ) was 1.31, 1.34, and 1.20 individuals/female/day for T. piercei, T. truncatus, and T. bambusae, respectively. The doubling time (Dt) was lowest in T. truncatus (2.4 days) compare to T. piercei (2.6 days) and T. bambusae (3.9 days). The two polyphagous Tetranychus mites collected in Bangladesh are found to have similar life table parameters fall within the parametric range of other Tetranychus mites found in various regions irrespective of food sources. This is the first report of life table parameters of monophagous T. bambusae.