Thermal requirements for the embryonic development of Periplaneta americana (L.) (Dictyoptera: Blattidae) with potential application in mass-rearing of egg parasitoids
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Data
2008-12-01
Autores
Bressan-Nascimento, S.
Oliveira, D. M. P.
Fox, E. G. P. [UNESP]
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Editor
Academic Press Inc. Elsevier B.V.
Resumo
The embryonic development of oothecae of Periplaneta americana was evaluated under four different constant temperatures (5, 10, 15, 20, 25, 30, and 35 degrees C and also at different exposure times at <5 degrees C. Their suitability as hosts after the treatment for the parasitoids Evania appendigaster and Aprostocetus hagenowii was also assessed. Temperatures of 5, 10, 15, and 35 degrees C adversely affected the development of the cockroaches, and exposure times to <5 degrees C longer than 5 days sufficed to kill all the embryos in the oothecae. The lower thermal threshold for complete development of P. americana was estimated to be 6.8 degrees C, with a required total amount of 900.9 degree-days. Cold-killed oothecae were still fit for the development of parasitoids. Parasitism rates of A hagenowii were higher than those of E appendigaster, although with lower emergence rates. Our results can be useful in aiding mass-rearing of these parasitoids for biological control programmes of A americana, and may help forecast the time of emergence of nymphs of American cockroaches in infested areas. (C) 2008 Elsevier B.V. All rights reserved.
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Mass rearing, Periplaneta americana, Evania appendigaster, Aprostocetus hagenowii, Cooling, Biological control
Como citar
Biological Control. San Diego: Academic Press Inc. Elsevier B.V., v. 47, n. 3, p. 268-272, 2008.