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Development and reproductive ability of lysiphlebus japonicus ashmead hymenoptera aphidiidae parasitizing the citrus brown aphid toxoptera citricidus kirkaldy homoptera aphididae



Development and reproductive ability of lysiphlebus japonicus ashmead hymenoptera aphidiidae parasitizing the citrus brown aphid toxoptera citricidus kirkaldy homoptera aphididae



Japanese Journal of Applied Entomology & Zoology 34(3): 237-244



The adult longevity, developmental period from egg to adult, age specific survival rate (lx), age specific fecunidity (mx) and maturation of ovarian eggs of Lysiphlebus japonicus ASHMEAD, which parasitizes the citrus brwon aphid Toxoptera citricidus (KIRKALDY), were examined under different constant temperature conditions. Longevity decreased with temperature. The developmental period from egg to adult decreased with temperature at a range between 12.degree.C and 25.degree.C. The number of mature ovarian eggs increased rapidly during 24 hr after emergence. Egg maturation was accelerated by oviposition. These traits in ovarian development resulted in the maximum value of mx at the first day of adult life. Lifetime fecundity was higher at 25.degree.C than at 20.degree.C, although adult parasitoids survived longer at 20.degree.C. On the basis of the results, rm of this parasitoid at 20.degree.C and 25.degree.C were estimated to be 0.243 and 0.441, respectively. Since rm of the parasitoid is much higher than that of alate hosts but nearly equal to that of apterous ones, the probability of successful control of T. citricidus by L. japonicus may depend on the morph and age distribution of the host in a colony at the time of the onset of parasitoid attack.

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Accession: 007197298

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DOI: 10.1303/jjaez.34.237


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