Acta Zoológica Mexicana (nueva serie) (2007) 23, 183-196

Horacio Tovar Hernández, Néstor Bautista Martínez, Jorge Vera Graziano, Alma Delia Suárez Vargas and Samuel Ramírez Alarcón (2007)
Fluctuación poblacional y parasitismo de larvas de Copitarsia decolora Guenée, Plutella xylostella L. y Trichoplusia ni Hübner (Lepidoptera) en Brassica oleracea L.
Acta Zoológica Mexicana (nueva serie) 23 (2), 183-196
Abstract: Population fluctuation and percentages of parasitism were determined for Copitarsia decolora (Guenée), Plutella xylostella L. and Trichoplusia ni Hübner on three varieties of B. oleracea, cabbage, cauliflower and broccoli, from April 2004 trough April 2005, in Acatzingo, Puebla, Mexico. Every 14 days randomized samplings in 10 plants by crop were made; the total number of larvae were recorded, collected and maintained in a rearing room at 27º C ± 1º C and 75% ± 5% of relative humidity for parasitoid development. The pest population was more abundant during head formation in cabbage and pellet formation in broccoli plant, for C. decolora, P. xylostella and T. ni, respectively. Diadegma insulare Cresson (Hymenoptera: Ichneumonidae) was obtained from P. xylostella larvae, whereas Voria ruralis Fállen (Diptera: Tachinidae) was obtained from T. ni larvae. The mean rate of parasitism for D. insulare was 46.78% and for V. ruralis only 0.7%. The population density and rates of parasitism were negatively affected by insecticide application on the crops of broccoli, cabbage and cauliflower.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Spanish)

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plutella xylostella	Cabbage (Brassica oleracea)	Mexico
	Trichoplusia ni	Cabbage (Brassica oleracea)	Mexico
	Copitarsia decolora	Cabbage (Brassica oleracea)	Mexico
Diadegma insulare (parasitoid)	Plutella xylostella	Cabbage (Brassica oleracea)	Mexico
Voria ruralis (parasitoid)	Trichoplusia ni		Mexico