engleski

EFFICIENCY OF INSECTICIDES AND BIOLOGICAL PROTECTION IN CONTROL OF WHITEFLIES /Trialeurodes vaporariorum/ ON GERBERA

Although the greenhouse whitefly (Trialeurodes vaporariorum Westwood) was quite common in European greenhouse in the past, since 1970 it has only really been important in tomato, cucumber, gerbera flowers. Accoding to the previous research, whiteflise were controlled in Croatia with insecticides, mehanical application of yellow sticky traps as well as biological protection, mainly in the trials. Combined protection measures should be applied in an intesive gerbera production aiming to achieve successful control of larvae and adult pests. Apart from spraying insecticides application and addition of agents via irrigation systems it is necessary, while using sticky traps, to include biological measures within control strategies. In the period 1997-2002 whitefly monitoring was performed in the greenhouses of D.G. Promet in Magadenovac. A striking attack of T. vaporariourum was reported on the variety of red colour gerbera Vino and purple variety Twigy. Cntrol trials involved insectides as follows: imidaclorprid (Confidor SL 200) et a concentration of 0, 15% (foliar spreying and drip irrigation system), Verticilium lecani (Vertimec) at 0, 05% and 0, 075% bifenthrin (Talstar 10 SC) at 0, 05%, methmyl (Lannate 20 L) at. 0, 25 %, pirmiphos-methyl (Actellic 50 EC) at 0, 1 and biological control with product EN-STRIP ( Encarsia formosa) and apply a mix of Encarsia formosa and Eretmocerus eremicus product ENERMIX. The most effective protection was obtained by biological preparation application combined with yellow sticky traps that contributed to early pest control.

whitefly; cemical and biological protection; gerbera

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