Potato Moth Phthorimaea Operculella Research Articles

Uso de bioinsecticidas para el control de plagas de hortalizas en comunidades rurales

Se evaluó el uso de bioinsecticidas elaborados a base de hongos entomopatógenos (Beauveria bassiana, Metarhizium anisopliae y Paecilomyces fumosoroseus); la producción se hizo de manera artesanal en comunidades rurales y se utilizaron para el control de plagas de hortalizas. Los productos fueron formulados con celite® y se usaron a dosis de 240g (1.2x1012 esporas/ha), para el control de plagas sobre plantaciones de lechuga Lactuca sativa L., rábano Rhapanus sativus, cebolla Allium cepa L., repollo Brassica oleracea var. capitata, papa Solanum tuberosum L. y cilantro Coriandrum sativum L. todos los aislamientos causaron mortalidades superiores al 80% a las 72 h, respecto al control, resultando efectivos para el control de la mariposa blanca de la col Pieris rapae, gusano dorso de diamante Pluxtella xylostella, gusano falso medidor Trichoplusia ni, pulgón de la col Brevycorine brassicae, Trips spp., palomilla de la papa Phthorimaea operculella, chicharrita Empoasca fabae, áfidos spp., minador Liriomyza trifolii y mosquita blanca Bemisia tabaci. Los bioinsecticidas beneficiaron a los productores de hortalizas ya que obtuvieron hortalizas libres de insecticidas químicos con mejores opciones de venta en el mercado

Genetic basis for resistance to a granulosis virus in the potato moth Phthorimaea operculella

Evidence is presented to show that the resistance to a granulosis virus in a laboratory strain of potato moth, Phthorimaea operculella, is controlled by a single dominant autosomal gene which segregates according to simple Mendelian ratios. This may be only one of a number of genes which influence the phenotypic expression of resistance and contribute to the wide variability in response to the virus shown by field populations of the moth.

Large-scale field testing of a granulosis virus for the control of the potato Moth (Phthorimaea Operculella (Zell.) (Lep., Gelechiidae))

A granulosis virus was tested on a field scale at Manjimup and Pemberton in Western Australia for control of its host, the potato moth Phthorimaea operculella (Zell.). The virus was produced on laboratory-reared larvae, and applied as a suspension of pulverised larvae (6 275 in 111 gal/ha) to second-crop (December-planted) potatoes. There were untreated and insecticide-treated (DDT, dieldrin, methyl-demeton) fields for comparison. The effectiveness of the treatments was assessed on numbers of larval mines and tuber damage. Virus infection rates of 100% were achieved, with a residual effect of 12 weeks. Variation in larval body weight indicated that initial dosages and those due to recycled virus were excessive, but were optimum after two months. Virus applications were as effective in preventing damage as insecticide treatments. Virus spread to untreated crops some miles distant was attributed to movements of personnel, farm materials or birds.

IMPROVED METHODS FOR THE PRODUCTION OF PARASITES OF THE POTATO MOTH PHTHORIMAEA OPERCULELLA (ZELLER) (LEPIDOPTERA: GELECHIIDAE)

AbstractMethods are described for rearing the potato moth Phthorimaea operculella and its parasites. Emphasis is placed on achieving maximal parasitization of the host eggs and larvae.