Browsing by Author "Akkopru, Evin Polat"

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Demographic Assessment of Plant Cultivar Resistance To Insect Pests: a Case Study of the Dusky-Veined Walnut Aphid (Hemiptera: Callaphididae) on Five Walnut Cultivars
(Oxford Univ Press inc, 2015) Akkopru, Evin Polat; Atlihan, Remzi; Okut, Hayrettin; Chi, Hsin
To provide a comprehensive evaluation of walnut cultivar resistance to the dusky-veined walnut aphid, Panaphis juglandis (Goeze), we collected the life table data of this aphid reared on five cultivars of walnut ('Akca I,' 'Chandler,' 'Fernette,' 'Fernor,' and 'Pedro') under field conditions. The raw data of the developmental time, survival rate, and fecundity was analyzed using the age-stage, two-sex life table to account for the variable developmental rate and stage differentiation among individuals. Due to the species' longer immature developmental time, shorter adult longevity, shorter reproduction period, and lower fecundity, the net reproduction rate (R-0 = 5.9 offspring), intrinsic rate of increase (r = 0.0983 d (1)), and finite rate (lambda = 1.1034 d (1)) were the lowest when aphids were reared on the Fernor cultivar, while those reared on Akca I exhibited the highest population parameters (R-0 = 18.0 offspring, r = 0.2031 d(-1), and lambda = 1.2252 d(-1)). Based on the population characteristics, Fernor is a less favorable cultivar for the development and reproduction of P. juglandis. We also demonstrated the advantages of using bootstrapping for the analysis of standard errors of developmental time, longevity, fecundity, and other parameters as well. Our results indicated that demographic analysis of pest development, survival, and reproduction based on the agestage, two-sex life table offers a comprehensive assessment of pest growth potential on different crop cultivars.
The Effect of Some Cucumber Cultivars on the Biology of Aphis Gossypii Glover (Hemiptera: Aphididae)
(Springer, 2018) Akkopru, Evin Polat
The development, reproduction, and population growth parameters of cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae), were studied on three different Cucumis sativus cultivars (Beith Alpha Balikesir, B.T. Bursaalpha, Beith Alpha MR,) under controlled conditions (25 +/- 1 degrees C, 65 +/- 5% RH, and a photoperiod of 16:8 (L:D) h. Life table parameters were estimated according to age-stage, two-sex life table method. Results indicated that the Bt Balikesir are favorable hosts for A. gossypii because of the shorter preadult developmental time, lower preadult mortality rate, and higher total fecundity on this cultivar. The intrinsic rate of increase (r = 0.4214 d(-1)), the net reproduction rate (R-0 = 51.80 offspring), and the finite rate of increase (lambda = 1.5242 d(-1)) values were higher on the Bt Balikesir. The effect of cucumber cultivars on the biology of A. gossypii was determined as significant and it was found that cv. Bt Balikesir was the most convenient cucumber cultivar in terms of the life cycle of A. gossypii. For an ecological and economic pest control, against aphids use of resistant or less favourable crop cultivars is considered one of the important components of integrated pest management. Therefore, results acquired might be used in pest management program that will be prepared for this aphid.
Effects of Five Different Melon (Cucumis Melo L.) Cultivars on Population Growth of Aphis Gossypii
(Czech Academy Agricultural Sciences, 2021) Bozkurt, Serdal; Akkopru, Evin Polat
In this study, population growth parameters of Aphis gossypii Glover (Hemiptera: Aphididae) on five different melons [Cucumis melo Linnaeus (Cucurbitaceae) cultivars (Balin, citirex, 221 F1, Gediz, Yusufbey)], which are commonly grown in Turkey, were investigated in laboratory experiments. Life table parameters were estimated according to age-stage and two-sex life table theory. The results showed that A. gossypii developed more successfully on the Gediz cultivar due to the higher intrinsic rate of increase (0.5042 1/day), the finite rate of increase (1.6557 1/day) and the shorter mean generation time (8.161 days) than the other cultivars. Ecological pest control against aphids' use of resistance or less favourable host plant cultivars is considered one of the significant components of pest management. The findings obtained in this study can be used in the pest management program designed for the aphid.
Molecular and Morphological Studies on the Genus Pseudococcus Westwood (Hemiptera: Coccomorpha: Pseudococcidae) in Turkey
(Magnolia Press, 2023) Kaydan, Mehmet Bora; Akkopru, Evin Polat; Yerlikaya, Huseyin; da Silva, Vitor Cezar Pacheco
Mealybugs (Hemiptera: Coccomorpha: Pseudococcidae) include economically important insect pests worldwide. Pseudo -coccus Westwood is the second biggest genus in Pseudococcidae, with several pest species. Pseudococcus adult females were collected and identified from wild and cultivated plants in Turkey. Molecular and morphological characters were analyzed to investigate the relationship among species. It was recognized that Pseudoccoccus species are shown in three distinctive groups concerning to both morphological and molecular aspects.
Predation Rate Linked To Life Table of Chrysoperla Carnea (Stephen) (Neuroptera: Chrysopidae) Fed on Small Walnut Aphid (Chromaphis Juglandicola) (Kalt.) (Hemiptera: Aphididae): With Population and Predation Projections (Vol 49, Pg 217, 2021)
(Springer, 2022) Yilmaz, Mehmet; Akkopru, Evin Polat