Relationship of Trialeurodes vaporariorum Westw. (Hom.: Aleyrodidae) and its parasitoid Encarsia formosa Gah. (Hym.: Aphelinidae)

Peric, P.

Relationship of Trialeurodes vaporariorum Westw. (Hom.: Aleyrodidae) and its parasitoid Encarsia formosa Gah. (Hym.: Aphelinidae)

1994

Peric, P. (Institut za zastitu bilja i zivotnu sredinu, Beograd (Yugoslavia))

It was found out the effect of two temperature treatments on the interactions between Trialeurodes vaporariorum and Encarsia formosa. The time of growth, fecundity and longevity of T. vaporariorum at 20 deg C were higher than at 25 deg C. Higher temperature treatment is more favourable for the growth of E. formosa, because at that time its fecundity increases, and its longevity decreases. For the growth of T. vaporariorum the most favourable relative humidity was around 80. However, it has the unfavourable effect of the flying out of the E. formosa adults. T. vaporariorum prefers to feed on tobacco, cucumber, linden tree, bean, fuchsia and gerbera in relation to chrysanthemum and pelargonium. The efficiency of E. formosa in T. vaporariorum control is lower under the conditions of short day, such as in the conditions of hair presence and secretion on the leaf.

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