Effects of different diets on oviposition rate of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)

Steinbach, D. and Kumm, S. and Moritz, G. (2012) Effects of different diets on oviposition rate of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae). Acta Phytopathologica et Entomologica Hungarica, 47 (1). pp. 151-159. ISSN 0238-1249

Text aphyt.47.2012.1.19.pdf Restricted to Repository staff only until 30 June 2032. Download (387kB)

Abstract

Frankliniella occidentalis is a highly polyphagous and virus transmitting crop pest that feeds on leaves, fruits and pollen of plants across nearly a hundred plant families and several hundreds of plant species. To evaluate the influence of different diets on egg development and oviposition rate of females of Western Flower Thrips, four different food sources (sucrose solution, pine tree pollen, Phaseolus vulgaris and Chrysanthemum grandiflorum leave solutions) were tested under lab conditions. The oviposition rate, the embryogenesis and the hatching rate of first instar larvae were investigated and showed a strong dependency on the diet quality. The results demonstrate a highly positive effect of the used pollen and a remarkable negative trend of sucrose solution on the fecundity. Additionally, a continuous negative trend of the oviposition rate is visible in both leave solutions. A significantly higher hatching rate was observed in oviposited leaves of P. vulgaris compared to C. grandiflorum leaves. Moreover, females fed on pollen deposit eggs in agar 1.5 times more than in sucrose solution under a parafilm layer.However, no significant differences were observed in the developmental time as well as in the development of the embryo when females were fed with different diets or provided with different oviposition habits. This leads to the conclusion that the diet has a great influence on the fecundity, but less on the number of offspring. However, as in many other investigations, the experiments were carried out with an arrhenotokous thrips population that lived for many years on beans under lab conditions.The use of plant leave solutions is useful for a standardized diet. However, starting with the preparation of the solution, there might be chemical processes taking place, which alter the natural substances of the plant and lead to different and partly unexpected results.

Actions (login required)

Edit Item