Effect of temperature and photoperiod on the biology of blue alfalfa aphid Acyrthosiphon kondoi Shinji

Kodet, R.T. and Nielson, M.W. and Kuehl, R.O. (1982) Effect of temperature and photoperiod on the biology of blue alfalfa aphid Acyrthosiphon kondoi Shinji. Other. United States Department of Agriculture, USA.

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Abstract

Laboratory studies were carried out in Arizona in 1975-77 on the effect of temperature and photoperiod on the development and reproduction of the lucerne pest Acyrthosiphon kondoi Shinji. The aphid was exposed to a total of 15 regimes of temperature and photoperiod. Temperature was found to have a significant role in development and reproduction. The optimum temperatures for development ranged from 20 to 25 deg C (depending on photoperiod), and the upper survival temperature from 25 to 30 deg C. The lethal temperature was 30 deg C. Higher survival and total fecundity occurred at low temperatures (10-15 deg C) rather than at high ones (20-25 deg C). There were significant temperature-photoperiod interactions on the rates of nymphal development, fecundity, life-span and generation time; changes in these rates were most prevalent at low temperatures. It was thought that shorter generation and doubling times and a greater intrinsic rate of increase in A. kondoi populations may account for the early dominance of this species over A. pisum (Harris) in lucerne fields in the USA in spring

Item Type:	Monograph (Other)
Uncontrolled Keywords:	Blue alfalfa aphid, Acyrthosiphon kondoi Shinji, alfalfa, biology, temperature effect, photoperiod effect
Author Affiliation:	Northern Division, Bruce Church Inc., PO Box 599, Salinas, California 93902, USA
Subjects:	Plant Protection
Divisions:	Other Crops
Depositing User:	Ms K Syamalamba
Date Deposited:	08 Nov 2012 03:48
Last Modified:	08 Nov 2012 03:48
URI:	http://eprints.icrisat.ac.in/id/eprint/8692

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