Biological aspects of the tortoise beetle, cassioa vittata vill., (coleoptera: chrysomelidae) as affected by feeding on different sugar beet varieties [electronic resource].

Includes reference.

Effect of feeding the tortoise beetle, C. vittata Vill., females emerged from diapause (FED) and larvae on different sugar beet varieties on its reproductive capacity, oviposition period incubation period & hatchability of eggs and the duration periods of larval and pupal stages were studied from February to August 2006. Results showed that the highest reproductive capacity ( 263 ± 68 eggs per female), the longest oviposition period (62 ± 15.8 days) and the highest feeding pores (10.6 ± 1 feeding pores Iday ) were recorded on Dema poly variety under laboratory conditions of 22.7 ± 4.1 CO and 42.7 ± 6.8 % R. H. There are significant differences when compared to Toro, Monte blanco and both varieties, respectively. Dema poly was the most preferred variety for oviposition and feeding. Feeding females or larvae on different sugar beet varieties had no significant effect on the incubation period and hatchability rate of eggs as well as the duration periods of larva and pupa. C vittata has a single generation in a year.

Summary in Arabic.

1