İlker KEPENEKÇİ

Article | 2016 | Turkish Journal of Entomology / Türkiye Entomoloji Dergisi40 ( 1 )

One of the major pests of the vegetables, root knot nematodes (Meloidogyne spp.) (Tylenchina: Meloidogynidae) (RKNs) can cause economic losses by forming knots on the host plant roots. RKNs are more prevalent in the greenhouse vegetable growing areas of the coastal regions. In this study, the effects of plant extracts from five different plants; Capsicum frutescens, Hyoscyamus niger (Solanaceae), Melia azedarach (Meliaceae), Xanthium strumarium and Achillea wilhelmsii (Asteraceae) were evaluated against RKNs. In the first studies; the effects of plant extracts (0.5, 1.0, 1.5, 3.0, 6.0 and 12.0% concentrations) on eggs, egg masses an . . .d second stage juveniles (J2s) of the Meloidogyne incognita were evaluated in laboratory conditions (in vitro tests). Concentrations of 3.0, 6.0 and 12.0% for H. niger, X. strumarium and M. azedarach caused 100% inhibition of egg hatching and J2s mortality. Effects of the same plant extracts against M. javanica on egg mass of nematode (I), the plant height (II), the plant age (III) plant dry weight (IV), root fresh weight (V) and root dry weight (VI) were also evaluated in greenhouse-pot studies. Result of pot trials, 12.0% of H. niger and X. strumarium has shown high effect on hatching studies. In the toxicity studies, 6.0% and 12.0% of X. strumarium and M. azedarach were found effective.Three plant extracts (X. strumarium, H. niger and M. azedarach), against mixed populations of M. incognita and M. javanica on tomatoes under natural greenhouse conditions (in vivo) were evaluated. Treatmets were repeated 4 times by watering for each pot (extract were applied 1 ml plant-1). In greenhouse trials, root gal indicies (root knot) and crop yield (tomatoes) (kg plant-1) values and effect of root gal indicies and yield (%) were evaluated. In vivo studies, it could be concluded that, only the M. azedarach has effected the galling indicies and consequentelly crop yield significantly. - Keywords: Root knot nematode, Meloidogyne incognita, M. javanica, plant extracts, tomat More less

Şenol YILDIZ

Article | 2021 | Turkish Journal of Entomology / Türkiye Entomoloji Dergisi45 ( 4 )

The study investigated nematode diversity in three contrasting habitat types around the Yenicaga Lake, Bolu Province, Turkey, in 2019 and 2020. The Shannon-Wiener index was used to evaluate nematode diversity in different taxonomic categories (order, family and genus level), trophic group and colonizer-persister (c-p) group in grassland, cropland and peatland in two locations, Hamzabey and Adakoy, in the Yenicaga Lake Reserve. The results revealed that there was statistically significant variation in the composition of nematode fauna between the study sites by the assessments of the higher taxa whereas genus level and family level l . . .ower taxa did not differentiate such variation in Hamzabey and Adakoy. In addition, the variation in nematode diversity in relation to soil types were better reflected by assessing the trophic group structures rather than the c-p groups. The findings indicated that the diversity at higher taxa might serve as a better indicator than the diversity of lower taxa (family and genera) variation among the habitat types of the study areas More less

Hüseyin GÖÇMEN

Article | 2017 | Turkish Journal of Entomology / Türkiye Entomoloji Dergisi41 ( 3 )

In 2016, Anoplophora chinensis (Forster, 1771) (Coleoptera: Cerambycidae) was recorded for the first time on Acer negundo L. in Antalya Province, Turkey. Genetic identification of adult samples was made based on approximate alignment of a 729-bp sequence of the mitochondrial cytochrome oxidase I gene region. The sequence alignment in the BLAST analysis from the NCBI Genbank showed 99% similarity with A. chinensis. The sequence data was deposited to NCBI Genbank. A phylogenetic analysis was performed by using the sequence data belonging to A. chinensis and some species of same genus obtained from the NCBI. According to the phylogenet . . .ic analysis, populations of A. chinensis from Antalya and China were placed in the same subgroup and therefore it is postulated that the origin of the Antalya population is China More less