Laboratory bioassays using leaf disks of apple dipped in test solutions of insecticides demonstrated that the apple aphid, Aphis pomi De Geer, and the spirea aphid, Aphis spiraecola Patch, differed significantly in susceptibility to a number of insecticides registered for control of aphids on apple (Malus spp.). Compared with A. pomi, A. spiraecola was approximately four- and three-fold less su...

The oriental aphid Schizaphis piricola (Matsumura) is recorded for the first time in Europe, on the ornamental pear tree Pyrus calleryana in landscaped areas in Madrid (Spain). Data on the morphology of the forms on primary host (apterous and alate fundatrigeniae and fundatrices), and their biology and distribution are given. The keys for identifying species of Schizaphis (Schizaphis) in the Ib...

The green apple aphid (Aphis pomi De Geer 1783) and the spirea aphid (Aphis spiraecola Patch 1914) are pests of apples in North America (Foottit et al. 2006). They play a role in disease transmission (Blackman and Eastop 2000) and affect healthy growth of their hosts (Kaakeh et al. 1993). Although management regimes exist to effectively control these pests, they differ significantly because of ...

Aphids are often present in apple orchards Serbia. They represent a significant group of pests for which insecticides regularly used. The most important species are: Aphis pomi, spiraecola, Dysaphis devecta, plantaginea, spp., Rhopalosiphum insertum and Eriosoma lanigerum. paper provides basic data on the development aphids their morphology, biology, distribution harmfulness plants. A identific...

The suitability of two prey species, Aphis pomi De Geer (Hemiptera: Aphididae) and Brevicoryne brassicae (L.), for two generalist aphidophagous coccinellids, Adalia tetraspilota (Hope) (Coleoptera: Coccinellidae) and Hippodamia variegata (Goeze), at various abundance levels was investigated under laboratory conditions. While both A. pomi and B. brassicae were found to be suitable, the predators...

life table parameters of aphis pomi degeer (hemiptera: aphididae) were determined on two host plants: apple (malus pumila l.) and flowering quince (chaenomeles japonica lindl.). this study was carried out under laboratory conditions (25 ± 1 ºc and rh of 70 ± 5 % and a photoperiod of 16: 8 h (l: d). the survivorship from first instar nymphs to adult was very close in m. pumila and c. japonica. t...

Gülnar (Mersin)’da elma ağaçlarında bulunan zararlı ve yararlı Arthropoda türlerini saptamaya yönelik olarak yapılan bu çalışma 2014-2015 yıllarında ilkbahar, yaz sonbahar periyotlarında sürdürülmüştür. Çalışma sonucunda, 26 13 tür tespit edilmiştir. En önemli türlerin; Panonychus ulmi (Koch, 1836), Aphis pomi DeGeer, 1773, Eriosoma lanigerum (Hausmann, 1802), Tropinota hirta (Poda, 1761) Cydia...