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Life Table Analysis of Diaphorina citri Hemiptera Psyllidae Infesting Sweet Orange Citrus sinensis in Sao Paulo

Paiva Paulo, E.B.; Parra Jose, R.P.

Florida Entomologist 95(2): 278-284

2012


ISSN/ISBN: 0015-4040
DOI: 10.1653/024.095.0206
Accession: 036487992

An ecological life table for eggs and nymphs of Diaphorina citri Kuwayama (Hemiptera: Psyllidae) was constructed with data obtained from orange orchards (Citrus sinensis Osbeck) in 2 regions of the State of S o Paulo, over 4 generations in the period from XI-26 to V-27, comprising spring, summer, and fall seasons. Young growing shoots with D. citri eggs present were identified, and live individuals were counted until adult emergence. No predatory arthropods were observed in association with D. citri eggs and nymphs during the study. The mean parasitism of fourth- and fifth-instar nymphs by Tamarixia radiata Waterston (Hymenoptera: Eulophidae) was 2.3%. The durations of the egg adult period were similar among the 4 generations, ranging from 18. to 24.7 d (at mean temperatures ranging from 21.6 to 26. C) and followed the temperature requirement models obtained in the laboratory for D. citri. However, survival from the egg to the adult stage for the same period varied considerably from 1.7 to 21.4%; the highest mortalities were observed in the egg and small nymphal (first- to thirdinstar) stages, which were considered to be key phases for population growth of the pest.

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