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ISSN : 1225-0171(Print)
ISSN : 2287-545X(Online)
ISSN : 2287-545X(Online)
시설 재배 가지에서 칼리 시비 수준에 따른 점박이응애의 생물적 특성
초록
Bionomics of Tetranychus urticae Koch on Eggplants under Various Potassium Regimes in Controlled Environment
Abstract
Development of T. urticae was studied on the leaves of eggplant grown in hydroponics with potash contents of 0 mM, 2 mM, 6 mM, and 12 mM. As the levels of potash increased, that of nitrogen decreased and that of P, K, Mg increased in the plant. While contents of crude protein and fiber decreased, those of ash and sugar increased. Carbohydrate content was the highest at 2 mM. Water contents increased as those of potash increased with the exception at 0 mM. Biomass was the heaviest as 552.7 g at 6 mM and the lightest at 0 mM. Leaf thickness and the content of chlorophyll increased as the content of potash increased. Laboratory leaf disc tests provided with various potash levels revealed that feeding and oviposition preferences of T. urticae were high at 6 mM and 12 mM, respectively. Ratio of damaged leaf by naturally occurring T. urticae on eggplants of 99 days post-transplant in the greenhouse was the highest at 6 mM. Development of immature stages of T. urticae shortened as the levels of potash increased with a less tendancy in male than in female. No differences were detected in adult longevity and oviposition period but the number of eggs laid was the most as 84.7 at 6 mM and the least as 40.6 at 0 mM. There were no differences in the rate of egg hatch and the ratio of sex. Ro, rm, and were the highest at 6 mM and the lowest at 0 mM. T and Dt were the λ lowest at 6 mM and the highest at 0 mM. There was a descending trand of T. urticae developmet when levels of potash either gets high or low in the hydroponics.
Potassium application level, Feeding preference, Development period, Mortality, Fecundity, Sex ratio, 칼리공급수준, 식이선호성, 발육기간, 사망률, 산란수, 성비
Reference
Vol. 40 No. 4 (2022.12)
Frequency Quarterly
Doi Prefix 10.5656/KSAE
Year of Launching 1962
Publisher Korean Society of Applied Entomology
Online Submission
submission.entomology2.or.kr
KSAE
The Korean Society of Applied Entomology
