Ocorrência do complexo Carpophilus humeralis (Fabricius)-Ceratocystis paradoxa (De Seynes) Moreau em cana-de-açúcar no Estado de São Paulo

Foi constatada a ocorrência do besourinho Carpophilus humeralis (Fabricius) (Coleoptera, Nitidulidae) no Estado de São Paulo, em toletes de cana-de-açúcar com podridão-abacaxi, causada pelo fungo Ceratocystis paradoxa (De Seynes) Moreau. Experimento conduzido com duas variedades de cana, IAC64-257 e NA56-79, tratamento do tolete com fungicida e posição da gema no tolete, demonstrou que a variedade NA56-79 respondeu positivamente ao tratamento com fungicida enquanto a variedade IAC64-257 não apresentou resposta. As gemas da extremidade do tolete foram mais afetadas que as centrais.

Life Cycle of Carpophilus humeralis F. (Coleoptera: Nitidulidae) in Puerto Rico

Carpophilus humeralis F. is one of the main pests on pineapple in Puerto Rico. This insect has high population densities because of a high reproductive potential, each female under laboratory conditions, lays about 542 eggs over a two month period, averaging 9 eggs per day; short larval period (18 days); longevity of adults (2.5 months); and abundance of ripe fruit in pineapple fields as sites for constant reproduction.

EFFECTS OF CaC2 ON THE OVIPOSITION OF CARPOPHILUS HUMERALIS F. (COLEOPTERA: NITIDULIDAE)

EFFECTS OF CaC2 ON THE OVIPOSITION OF CARPOPHILUS HUMERALIS F. (COLEOPTERA: NITIDULIDAE)

Conditions that Affect Populations of Carpophilus humeralis F. (Coleoptera:Nitidulidae) in the Pineapple Fields of Puerto Rico

A survey of the factors that affect the population of Carpophilus humeralis (a sap beetle pest of pineapple fruits) was conducted in the pineapple growing areas of Puerto Rico. Soil moisture as well as bad phytosanitary practices are the principal factors related to the increase of the insect population. The use of varieties resistant to gummosis, a condition of the fruit that helps the penetration of C. humeralis into the fruit, and good cultural practices decreased the insect population and the damage caused by it.

INSECTICIDE EVALUATION FOR THE CONTROL OF CARPOPHILUS HUMERALIS F. IN PINEAPPLE FIELDS OF PUERTO RICO

INSECTICIDE EVALUATION FOR THE CONTROL OF CARPOPHILUS HUMERALIS F. IN PINEAPPLE FIELDS OF PUERTO RICO