Bitki ekstraktlarının Sera beyazsineği [TrialeurodesThe contact toxicity, repellent and anti-ovipositional effects of 7 plant extracts (Achillea biserrata, Heracleum platytaenium, Humulus lupulus, Hyoscyamus niger, Phlomis pungens, Rhododendron ponticum, Salvia tomentosa ) were tested on the greenhouse whitefly (Trialeurodes vaporariorum) under laboratory conditions. Hyoscyamus niger extract produced the greatest contact toxicity among the tested plant extracts with 79% mortality and it was followed by H. lupulus extract with 74% mortality. In the second part of the study, the dose response bioassays with H. niger and H. lupulus were carried out. The calculated LC 50 values for 3. stage nymph were 6.65% plant extract /acetone (w/v) and 8.09% plant extract /acetone for respectively. LC 50 values of H. niger and H. lupulus for adult stage were 6.64% and 9.49% respectively. Repellent and antiovipoisition effects of 2 plant extracts (H. niger , H. lupulus ) were also tested against the grennhouse whitefly. In the behavioral studies, H. lupulus extract was the most active among the tested plant extracts and it totally inhibited T. vaporariorum female egg laying in anti-oviposition study.

As a result of three year surveys performed in the apple orchards in Isparta region, 19 pest species belonging to 4 orders were determined and it was found that the main pest was codling moth. Most of the predators and parasitoids were effective against aphids and they were mostly found in the orchards where selective pesticides were used. Apple scab and powdery mildew were the most common and important diseases. Biology of codling moth and apple scab in the region were investigated. By using the obtained data, proper application times were given and some recommendations regarding integrated pest management program in apple orchards, were summarized.

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