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-dayold) 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.
Abstract. The study was carried out to determine egg parasitoids of Lobesia botrana (Den. & Schiff.) on Sultani Cekirdeksiz grape in Izmir and Manisa between 2009-2011. Both eggs found on grape berries in vineyards and the eggs reared in the lab and mounted onto bunches were used to determine egg parasitoids. Minimum 50 lab-reared eggs were mounted at the level of bunches in each vineyard. These eggs were recollected after 2-4 days and maintained in the climate room for checking daily if parasitized. Parasitism rate by Trichogramma euproctidis Girault (Hymenoptera: Trichogrammatidae) on mounted L. botrana eggs was determined as 8% in conventional vineyard of Sarıgöl in 2009, whereas it was found 10.91% in conventional vineyard of Salihli, 5% in organic vineyard of Alaşehir and 1.33% in integrated vineyard of Menemen in 2010. Natural parasitism of L. botrana eggs on berries by T. euproctidis was determined as 10% and 16% in integrated vineyard of Alaşehir in 2009 and 2010, respectively. T. euproctidis parasitized 38.6% of eggs whereas T. brassicae (Bezdenko) parasitised 1.44% of eggs on the berries in 2011. T. euproctidis and T. brassicae have been determined on the eggs of L. botrana in the Aegean Region, Turkey for the first time.
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