Vargas-Cruzado, Edgardo

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Relación hospedero Parasitoide y dinámica poblacional de los parasitoides de las masas de huevos de Diaprepes Abbreviatus (L.) (Coleoptera : Curculionidae) en Puerto Rico
(2003) Vargas-Cruzado, Edgardo; Franqui-Rivera, Rosa A.; College of Agricultural Sciences; Abreu Rodríguez, Edwin; Medina Gaud, Silverio; Department of Crops and Agro-Environmental Sciences; Mari Mutt, José A.
A study was done at Adjuntas and Isabela with the purpose of identifying the parasitoid species associated with the eggs mass of the sugarcane weevil. Four species of parasitoids were found, three in the family Eulophidae and one the family Trichogrammatidae. The eulophid species were Tetrastichus haitiensis, Aprostocetus gala and Horismenus bennetti and Brachyufens osborni in the Trichogrammatidae. It was found that the months with the higher incidence of parasites were June and July. Tetrastichus haitiensis was selected for the study of host-parasitoid relation. The preference of this parasitoid for the age and size of the eggs mass of the sugarcane weevil was determined. The parasitoid wasps prefer 12 hours eggs, when compared with 24, 48 and 72 hours; for the size of the eggs mass the parasitoid prefers 71-107 eggs per mass. Also the preference of the sugarcane weevil for oviposition was studied in four hosts (yam, sweet potato, orange, pigeon pea). The oviposition was higher in the yams and sweet potato leaves.