Sarmiento-Calva, Leidy Maricela

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    Caracterización agronómica/morfológica de genotipos de gandul [Cajanus cajan (L.) Millsp.] y sus niveles de tolerancia a infestaciones naturales de Heliothines (Lepidoptera: Noctuidae), y pruebas de eficacia para evaluar insecticidas en el control de larvas
    (2021-05-13) Sarmiento-Calva, Leidy Maricela; Viteri-Dillon, Diego M.; College of Agricultural Sciences; Linares-Ramírez, Angela M.; Carrera-Asencio, Irma; Department of Crops and Agro-Environmental Sciences; Lorenzo-González, Edgardo
    Pigeonpea [Cajanus cajan (L.) Mills.] is an important legume in Puerto Rico. The objectives of this thesis were to evaluate: (1) the agronomic performance of 15 pigeonpea genotypes, (2) the resistance/tolerance of these genotypes to natural infestations of Heliothis virescens (Fabricius) (Lepidoptera: Noctuidae), and (3) the efficacy of insecticides to control H. virescens and Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae) larvae by field tests and bio-assays, respectively. Genotypes with tolerance/resistance to H. virescens were not identified. However, ʻICPL 86012ʼ and ICP 98030 were early maturing genotypes and insensitive to the photoperiod. In addition, applications of beta-cyfluthrin and chlorantraniliprole were the most effective way to control H. virescens and increased seed-yields in more than 35%. In contrast, chlorpyrifos, the nematode Steinernema carpocapsae (Weiser) (Nematoda: Steinernematidae), and the combinations of chlorantraniliprole + S. carpocapsae and spinetoram + S. carpocapsae, caused more than 80% of H. zea larval mortality.