The population fluctuations of Asymmetrasca decedens (Paoli, 1932) and Zyginidia pullula (Boheman, 1845) (Homoptera: Cicadellidae) in maize fields in Izmir [Izmir ili misir tarlalarinda Asymmetrasca decedens (Paoli, 1932) ve Zyginidia pullula (Boheman, 1845) (Homoptera: Cicadellidae) türlerinin populasyon degişimi]

This study was carried out during the years of 2004-2005 in Menemen- Izmir (Turkey) with aim to determine the population fluctuations of Asymmetrasca decedens (Paoli, 1932) and Zyginidia pullula (Boheman, 1845) (Homoptera: Cicadellidae). The species were collected weekly within june - october by using yellow sticky traps from four different maize fields. With this study similarity in population fluctuations of A. decedens and Z. pullula to each other was shown and their presence in first and second crop maize vegetations was determined. The populations of each species began to increase at the 2-4 leaf stage of first maize crop and reached its highest levels at the harvest stage. After this stage, rapid decrease in the population of A. decedens and Z. pullula was seen due to maturation of plants of first crop. During the same time, the pests reached their highest population density in the second crop maize which was in 2-4 leaf stage providing abundance of fresh food for the pests. The population of the pests in the second crop decreased significantly close to harvest period, reaching to zero at harvest time. In both years the population density of A. decedens and Z. pullula in first crop, were lower than in second year crops. The comparison of the experimental data showed that the adults numbers found in 2005 were higher than in the previous year

Effects of two different neem products on different states of Nezara viridula (L.) (heteroptera, pentatomidae)

In this study, the effects of two different commercial neem insecticides (NeemAzal T/S and Neem Oil) were determined on different stages of Nezara viridula (L.) (Heteroptera: Pentatomidae) under laboratory conditions. Neem Azal and Neem Oil were applied at concentrations of 0.5 % and 2 %, respectively. Mortality was recorded after 3, 7 and 14 days for nymphs and adults; 7 and 14 days for old (4-day-old) eggs; and 14 days for newly laid (one-day-old) eggs. Both products have no significant effect on adults and newly laid eggs. However Neem Oil was found to be more effective than NeemAzal T/S on nymphs and on old laid eggs after 7 and 14 days. It can be concluded that both neem products have potential for insecticidal efficacy (approximately 60 %) against nymphs of N. viridula. at concentrations recommended by manufacturers for registered pests

An Annotated List of Scale Insects (Homoptera: Coccoidea) from Turkey

A list of 176 species of Coccoidea recorded from Turkey, belonging to 13 families and 84 genus, is presented. This list is taken from the authors collection records and from bibliographical sources. The most numerous families are Diaspididae (93 species), Coccidae (33 species) and Pseudococcidae (22 species). The remaining families have between 1 and 6 species each. Of the 176 species 12 are considered to be endemic. In Turkish orchard systems, 15 species are of sufficient economic importance to require control measures. In addition to the cultivated plants, non-cultivated plants have many scale insect on them because of the zoogeographical situation of Turkey, lying as it does between the Mediterranean, the Irano-Turanian and Euro-Siberian subregions of Palaearctic. This list is unlikely to be complete and further studies are needed

Effects of two different neem products on different stages of Nezara viridula (L.) (Heteroptera, Pentatomidae)

WOS: 000188241300002In this study, the effects of two different commercial neem insecticides (NeemAzal T/S and Neem Oil) were determined on different stages of Nezara viridula (L.) (Heteroptera: Pentatomidae) under laboratory conditions. Neem Azal and Neem Oil were applied at concentrations of 0.5 % and 2 %, respectively. Mortality Was recorded after 3, 7 and 14 days for nymphs and adults; 7 and 14 days for old (4-day-old) eggs; and 14 days for newly laid (one-day-old) eggs. Both products have no significant effect on adults and newly laid eggs. However Neem Oil was found to be more effective than NeemAzal T/S on nymphs and on old laid eggs after 7 and 14 days. It can be concluded. that both neem products have potential for insecticidal efficacy (approximately 60 %) against nymphs of N. viridula. at concentrations recommended by manufacturers for registered pests