Ecological aspects and egg parasitism of the tortoise beetle, Cassida vittata Vill., (Coleoptera: Chrysomelidae) on sugar beet in Dakahlia Governorate [electronic resource].

Includes reference.

The tortoise beetle, Cassida vittata Vill. (Coleoprera: Chrysomelidae) is a serious pest on sugar beet, Beta vulgaris L., in Egypt. Four free pesticides's fields were planted with Raspoly sugar beet variety to study some aspects of ecology and egg parasitism of this pest at Bilqas and Shirbin in Dakahlia governorate during 2004-2005 and 2005-2006 growing seasons. Obtained results proved that level and intensity of infestation, population density of larvae, pupae and adults and no. of deposited and parasitized eggs were fluctuated greatly. It ranged between about 64-73%, 7-9 feeding pores/4 cm² leaf disc, 6-9 individuals/leaf,12-16 eggs/leaf, and 19-29% at Bilqas and Shirbin, respectively.

Summary in arabic.

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