Pesquisa Agropecuária Brasileira (2000) 35, 1305-1310
Simone Mendes, Marcia Nascimento Cerviño, Vanda Helena Paes Bueno and Alexander Machado Auad (2000)
Diversidade de pulgões e de seus parasitóides e predadores na cultura da alfafa
[Diversity of aphids and their parasitoids and predators in alfalfa crop]
Pesquisa Agropecuária Brasileira 35 (7), 1305-1310
Abstract: This work was carried out with the objective of showing the diversity of aphids and their predators and parasitoids, as well as the influence of the climatic factors on these insects in alfalfa crop. The survey was done weekly from April/95 to March/96. Four species of the aphids were found: Therioaphis trifolii (Monel) f. maculata, Acyrthosiphon pisum (Harris), A. kondoi Shinji and Aphis craccivora Kock, which were present in the crop during all the survey period, with the population peaks in November/95, July/95, December and April/96, respectively. Predator insects belong to families: Coccinellidae, Syrphidae, Anthocoridae, Geocoridae and Chrysopidae were found. Species of Coccinellidae occurred during all the survey period, with the population peak in the end of December with 20 mm of rainfall and 22.6ºC. The Syrphidae species reaching higher numbers in April/95, with 53 mm of rainfall and 21ºC. Orius sp. was the only specie of Anthocoridae, with a peak in the end of December/95, under the same conditions as to Coccinellidae. Two species of the parasitoids were found: Aphidius colemani Viereck and A. ervi Haliday with the population peak in June/95 at 16ºC.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): Alexander M. Auad, Vanda Helena Paes Bueno
Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation
