Studying Polymorphism of Oenopia conglobata (Linnaeus) (Col.: Coccinellidae) in Shahrood and Bastam regions in Semnan province
عنوان دوره: دومین کنگره بین المللی حشره شناسی ایران
نویسندگان
چکیده
Ninty percent of reported ladybirds are principle predators of aphids, scales, psylles, mites and egg and larvae of pests. Ladybirds are considered as more suitable insect group for polymorphism studies. Ladybirds are a classic group for studying polymorphism mechanisms. Important features are considered in ladybirds polymorphism studies including color and pattern of the dorsal surface of the head, scutellum and elytra and the elytra spots. In a survey on the fauna of ladybirds which was carried out in Shahrood and Bastam regions during 2015, Oenopia conglobata, with a frequency of 11/23% was the fourth abundant species. O. conglobata is the most important natural enemy of pests such as aphids, psyllids and lace bugs which their activity is proved on the non-fruits trees and fruit trees. Variation of the color pattern of elytra in O. conglobata was studied on ornamental and forest plants in two different weather conditions in Shahrood and Bastam regions. Samples were collected by net trap and whitetray. After transferring to the laboratory, the specimens were placed in glass with alcohol 75%. The identification was done using references and identification keys and the identification was confirmed by Dr Sadeghi and Dr Nedved. Different morphs were identified based on morphological characteristics including color, size, pattern and number of spots on dorsal surface of the elytra. Four different morphs of O. conglobata were identified. Obtained data showed that morph abundance and diversity was higher in Bastam region than those in Shahrood. It seems that the climate conditions and diversity of plants in Bastam play an important role in the abundance of O. conglobata morphs in this region. The study of polymorphism of O. conglobata is done for the first time in Shahrood and Bastam regions.
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