(Umbelliferae) were tested on nymphal stages of Eurygaster maura L. (Heteroptera: Scutellaridae). The results showed that the young nymphal stages were more sensitive than old nymphal stages. According to LC 50 value obtained from three incubation times (24,48 and 96 h) F.vulgare and T. vulgaris appear to be the most toxic plant extracts among the tested extracts for all nymphal stages. While C. cyminum extract was the most toxic extract with LC 50 value of %3.5 at young nymphal stages, F.vulgare was the most toxic extract with LC 50 value of %7.46 at older nymphal stages after 96 h. In phytotoxicity test, phytotoxicity symptoms on plant tissue were not apparent except for T. vulgaris, P. anisum, L. angustifolia and A. absinthium extracts. These results suggest that F. vulgare, C. cyminum and T. vulgaris extracts have potential to manage the sunn pest. However, further researchs to examine toxic active compound of the extracts and field efficacy by improving right formulation should be conducted. Üzerinde Araştırmalar" isimli doktora tezinden üretilmiştir.

Botanical insecticides may be an alternative to minimize or replace the use of synthetic chemical insecticides against pests of agricultural importance. In this search, the ovicidal effects of four plant extracts Lemon Balm Melissa officinalis L, Hop Humulus lupulus L, Oregano Origanum vulgare L. and clove Syzygium aromaticum (L.) were tested against Eurygaster maura L. (Hemiptera:Scutelleridae) under laboratory conditions. One to three-day-old eggs were dipped in plant extracts. The effects of three concentrations of plant extracts 2.5, 5 and 10% were studied. It was observed that as the concentration increased, the inhibition of egg hatchability increased. Lemon Balm extract didn't show significant ovicidal effect. On the other hand, Oregano and clove extracts moderately showed ovicidal effect. Hop extract revealed the best result in inhibiting egg hatchability (57.49%) at 10% concentration. It can beconcluded that hop extract may be used as supportive in an integrated pest management programme aimed at controlling E.maura.

In this study, the development of Lasioderma serricorne (F.) (Coleoptera: Anobiidae) was investigated on five different foods (Mentha piperita, Thymus vulgaris, Salvia officinalis, Rosmarinus, officinalis and flour). Trials were carried out at a temperature of 28±2°C and 70-75% relative humidity. Effects of foods on development adult longevity and egg hatching ratio of Lasioderma serricorne were investigated. As a result, all of the Lasioderma serricorne larvae left on the Rosmarinus officinalis plant have not completed their development and died. The shortest larval development time was in flour (37.35 days) and the longest in Mentha piperita (62.96 days). The shortest Pupal development time was seen in Salvia officinalis (4 days), while the longest was seen in Thymus vulgaris (4,42 days). Mentha piperita (10,50 days) had the shortest adult longevity and was the longest flour (15,5 days). When the egg development time was examined, it was seen that the shortest time was in Thymus vulgarris (5,42 days) and the longest time was in flour (5,97 days). The rate of larvae that completed its development was highest in flour (92%) and lowest in Salvia officinalis (5%). The rate of pupae that completed its development was highest in flour (80,30%) and lowest in Salvia officinalis (37.50%). In the percentages of hatched eggs, it was observed that the lowest opening was in thyme with 56.27% and the highest opening was in flour with 88.89 %.

Bu çalışmada, Kermes meşesi, Quercus coccifera (L.) yapraklarından elde edilen ekstraktın kültür bitkilerinin önemli zararlılarından Pamuk kırmızıörümceği, Tetranychus urticae Koch (Acarina: Tetranychidae), depolanmış ürün zararlılarından Börülce tohumböceği, Callosobruchus maculatus F. (Coleoptera: Chrysomelidae) ve Kuru meyve güvesi, Plodia interpunctella (Hubner) (Lepidoptera: Pyralidae)'ya toksik etkileri araştırılmıştır. T. urticae ve C. maculatus'un erginleri, P. interpunctella'nın ise 3-4. dönem larvaları denemelerde kullanılmıştır. Yaprak ekstraktının (% 20, % 10, % 5, % 2.5 ve % 1.25 (w/w)) beş farklı konsantrasyonu kullanılmıştır. Denemeler 28±1°C sıcaklık, % 65±5 orantılı nem (T. urticae için 16 saat aydınlatma süresi) koşullarında yürütülmüştür. Denemeler 3 tekerrürlü olarak yürütülmüştür. Sayımlar uygulamadan 24 ve 48 saat sonra yapılmış ve ölü ve canlı bireyler kaydedilmiştir. T. urticae' de bitki ekstraktının oldukça etkili olduğu ve uygulamadan 48 saat sonra % 10'lik konsantrasyonda % 98 oranında ölüm meydana getirdiği görülmüştür. C. maculatus'ta en yüksek ölüm oranı % 20'lik ekstrakt konsantrasyonunda ve 48 saat sonunda % 96 olarak belirlenmiştir. Q. coccifera yaprak ekstraktının P. interpunctella larvalarına toksik etkisinin düşük olduğu belirlenmiştir.