Feeding and oviposition preference of Phyllophaga cuyabana (Moser) (Coleoptera: Melolonthidae) on several crops

Abstract

Neotropical Entomology 36(5): 759-764 (2007) Preferência Alimentar e Oviposição de Phyllophaga cuyabana (Moser) (Coleoptera: Melolonthidae) em Diferentes Culturas RESUMO -Estudos em laboratório e em casa-de-vegetação foram conduzidos para estudar a preferência de Phyllophaga cuyabana (Moser) em se alimentar e ovipositar nas espécies de plantas: Cajanus cajan

Soil organisms associated to the weed suppressant Crotalaria juncea (fabaceae) and its importance as a refuge for natural enemies

“…was found in both the larval and adult stages (Table 1). The higher number of species of the order Coleoptera in the soil of C. juncea confirms that these are the most abundant species in soil with green manure Cajanus cajan (Fabaceae), C. juncea, S. cinereum, and Stylosanthes guianensis (Fabaceae) (Oliveira & Garcia, 2003;Oliveira et al, 2007;Santos et al, 2008 clavipes, and O. insidiosus were the most common natural enemies found in C. juncea, while the most common pests were Diabrotica sp., M. incognita, Phyllophaga sp., and Procornitermes sp. The organisms found over a 3-month period in 144 trenches in C. juncea were pest species (84.47%) and natural enemies (15.53%).…”

“…Weeds can be damaged by defoliators associated with C. juncea, which affects organic agriculture where the use of synthetic pesticides is forbidden (Gill et al, 2010). Moreover, defoliators of Phyllophaga cuyabana (Coleoptera: Melolonthidae) would rather feed on C. juncea than on crops (Oliveira & Garcia, 2003;Oliveira et al, 2007). Crotalaria juncea plants increased moisture and reduced soil temperatures after the incorporation of this green manure and decaying vegetal material released allelochemical substances, attracting soil pests and repelling air natural enemies (Venette et al, 1997;McSorley et al, 2006).…”

Seasonal and vertical distribution of Phyllophaga cuyabana (Moser)(Coleoptera: Melolonthidae) in the soil profile

“…Phyllophaga cuyabana (Moser) is considered a soybean and maize pest in South and Central Brazil (Oliveira et al 2004). Although some studies on its life cycle (Oliveira et al 1996) and adult behavior , Oliveira et al 2007, Zarbin et al 2007 were carried out in Brazil, little is known on its bionomic aspects in the fi eld. Therefore, the objectives of this research were to study the seasonal occurrence of the P. cuyabana population in soybean fi elds and to establish the effect of climatic factors on the temporal and vertical distribution patterns of the white grub in the soil profi le, to allow for adequate population sampling techniques to aid on the management of this pest on soybean crops.…”

Sweet Potato Resistance to <I>Euscepes postfasciatus</I> (Coleoptera: Curculionidae): Larval Performance Adversely Effected by Adult's Preference to Tuber for Food and Oviposition

“…This means there was discordance between these numbers (i.e., differences in preference for food and for oviposition in adults). Such discrepancy in the preference for food and oviposition is known between plant species and other insect species (e.g., Walsh 2003, Lyytinen et al 2007, Oliveira et al 2007, Azerefegne and Solbrec 2010, as well as between plants in one species (Nahrung and Allen 2003). As only tubers were used to evaluate resistance in this study, characteristics in the tuber alone would have determined weevil preferences.…”