ARTHROPOD BIOLOGY Effect of Temperature and Host on Development of Brachycaudus schwartzi (Homoptera: Aphididae)
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چکیده
Populations of Brachycaudus schwartzi (Börner) were found on peach and nectarine (Prunus persica Siebold & Zuccarini) trees in Parlier, CA, in summer 2000. To determine if this aphid could be a pest of P. persica, a nine-variety host range test was conducted using a no-choice arena and temperature-dependent development studies of the aphid at 15, 20, 22.5, 25, 27.5, 30, and 32.5 C. Nectarine varietyMayÞre (rm 0.286) andQueencrest peach (rm 0.283)were found to be the best hosts followed by Mayglo nectarine (rm 0.253). MayÞre was, therefore, selected as the host plant for the colony and for the temperature development studies. Detached shoot terminals of MayÞre were maintained on HoaglandÕs solution and placed in small cages in growth chambers. One adult aphid was introduced onto each ßush and development of aphid offspring was monitored daily. The shortest developmental time fromÞrst instar to adult aphidwas 6.9 d at 25 Cand the longestwas 19.9 d at 15 C. Adult longevity was 38.5 d at 15 C and the highest offspring per female was 46.4 nymphs per female at 20 C. The intrinsic rate of increase (rm) rose sharply from 15 C (0.109 nymphs/ /d) to a maximum at 25 C (rm 0.286), and then fell sharply at 27.5 Cwith high mortality at 30 C and above. The lower threshold for development was 10.04 C. Overall, the data indicate that B. schwartzi does better at cooler temperatures and that early season peach or nectarine varieties may be susceptible to damage by this aphid.
منابع مشابه
Biology, Ecology and Behaviour of Aphidophagous Insects BIOLOGICAL CONTROL OF THE ROSY APPLE APHID, Dysaphis plantaginea (PASSERINI) (HOMOPTERA: APHIDIDAE): LEARNING FROM THE ECOLOGY OF LADYBIRD BEETLES
HEMPTINNE, J.-L., A.F.G. DIXON & E. WYSS 2003. Biological control of the rosy apple aphid, Dysaphis plantaginea (Passerini) (Homoptera: Aphididae): learning from the ecology of ladybird beetles. Pp. 33-41 in A.O. SOARES, M.A. VENTURA, V. GARCIA & J.-L. HEMPTINNE (Eds) 2003. Proceedings of the 8th International Symposium on Ecology of Aphidophaga: Biology, Ecology and Behaviour of Aphidophagous ...
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