EUPOECILIA AMBIGUELLA PDF

In letteratura sono citati casi eccezionali di sfarfallamenti iniziati ad aprile o a marzo [2]. Gli sfarfallamenti dei maschi precedono in media quelli delle femmine. Le femmine depongono le uova nelle infiorescenze, in genere in corrispondenza dei boccioli fiorali, e da queste si sviluppa la generazione antofaga, che si nutre a spese dei fiori della vite. La ninfosi della prima generazione ha la durata giorni.

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Males and females exhibit no sexual dimorphism in wing pattern although females may be slightly larger than males. Males lack a forewing costal fold. Male genitalia are distinguished by a reduced uncus , short socii , prominent transtilla, distally triangular valva , and large aedeagus. Female genitalia are distinguished by a broad, short ductus burase and a corpus bursae with numerous sclerotizations and spines.

Adults may be confused with other species of Eupoecilia or European Cochylini , although E. A genitalic dissection can be used to confirm E. Larval Morphology Late instar larvae are approximately mm in length. The head, prothoracic shield , and legs are dark brown to black. Body color varies from brown to yellow and green. Pinacula are large, conspicuous, and brown. The anal shield is pale brown.

Larvae cause damage similar to Lobesia botrana and the two species can be found sympatrically. Other tortricid grape pests include: Argyrotaenia franciscana , Argyrotaenia ljungiana , Epiphyas postvittana , Paralobesia viteana , Platynota stultana , and Proeulia spp. Larvae of E. Biology The life cycle of E. Pupation occurs in leaves for the first generation and under bark for the second generation.

Overwintering occurs as a second generation pupa. Development time is highly dependent on temperature and humidity. The most significant losses are due to secondary infection of feeding sites on berries and clusters by Botrytis cinerea. Economic thresholds vary with the type of grape and cultivar.

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