Biological parameters and population development of Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) on different pepper cultivars

Abstract

SummaryPepper cultivar preferences of Tetranychus urticae Koch, 1836 (Acari: Tetranychidae) were determined by comparing its development, survival, oviposition, life table parameters and population development under controlled laboratory conditions with a 16L:8D photoperiod at 27±1ºC and 65±5% RH in Bursa (Turkey) during 2015-2016. Based on assays performed on leaf discs of six pepper cvs BT-Ince Sivri, BT-Burdem, BT-Burkalem, AHCRIÇarliston, AHCRI-Yağlık and AHCRI-Kandil Dolma, there were significant differences in egg hatch, juvenile development duration, intrinsic rate of natural increase (rm), net reproductive rate (Ro) and mean generation time (T) of the mite. The study showed that the life table parameters, rm (0.16-0.24), ) and T (14.22-16.39) for T. urticae were different when it was fed on different pepper cultivars. Significantly lower life table parameter values (rm, Ro and T) for T. urticae were observed on cv. BT-Ince Sivri, followed by cvs BT-Burdem and BT-Burkalem. Additionally, the mite densities on pepper seedlings of these three cultivars were significantly lower compared with those on seedlings of cvs AHCRI-Çarliston, AHCRI-Yağlık and AHCRI-Kandil Dolma. Furthermore, a lower survival rate was observed during juvenile development on cv. BT-Ince Sivri. Among the pepper cultivars, cv. BT-Ince Sivri had the lowest life table parameter values. Thus, the findings suggest that cvs AHCRI-Çarliston, AHCRI-Yağlık and AHCRI-Kandil Dolma are more susceptible to T. urticae than cvs Bursa BT-Ince Sivri, BT-Burdem and BT-Burkalem. Keywords:Pepper, cultivar, demographic parameters, two-spotted spider mite, population development ÖzetBu çalışmada Tetranychus urticae Koch, 1836 (Acari: Tetranychidae)'nin farklı biber çeşitleri arasındaki konukçu tercihi Bursa (Türkiye)'da 2015-2016 yılları arasında kontrollü laboratuvar koşullarında (16:8 aydınlık: karanlık, 27±1ºC sıcaklık, %65±5 orantılı nem) elde edilen zararlının gelişim, canlılık, ovipozisyon, hayat tablosu parametreleri ve popülasyon gelişim verileri karşılaştırılarak belirlenmiştir. Altı farklı biber çeşidi (BT-Ince Sivri, BT-Burdem, BTBurkalem, AHCRI-Çarliston, AHCRI-Yağlık ve AHCRI-Kandil Dolma) yapraklarıyla yapılan testler sonucunda akarın yumurta açılımı, ergin öncesi dönemlerinin gelişme süresi, kalıtsal üreme yeteneği (rm), net üreme gücü (Ro) ve toplam üreme oranı (GRR) açısından istatistikî anlamda önemli farklılıklar bulunmuştur. Bu çalışmada, T. urticae farklı biber çeşitleri üzerinde beslendiği zaman hayat tablosu parametre değerlerinin rm (0.16-0.24), ) değişiklik gösterdiği belirlenmiştir. Tetranychus urticae'de önemli düzeyde daha düşük biyodemografik parametre değerleri (rm, Ro ve T) sırasıyla BT-Ince Sivri, BT-Burdem ve BT-Burkalem çeşitlerinde saptanmıştır. Buna ek olarak, bu üç çeşidin biber fideleri üzerindeki popülasyon yoğunluğu da diğer üç çeşide (AHCRI-Çarliston, AHCRIYağlık ve AHCRI-Kandil Dolma) göre önemli düzeyde daha düşük bulunmuştur. Ayrıca, gelişme döneminde en düşük akar canlılığı BT-Ince Sivri çeşidinde gözlemlenmiştir. ...

Life table of Tetranychus urticae (Koch) (Acari: Tetranycidae) on different Turkish eggplant cultivars under controlled conditions

“…The immature developmental time was very similar with the values (9.1-11.2) reported by Khanamani et al (2013) on seven Indian eggplant cultivars. In addition, these durations are very close with previous studies performed on different suitable hosts in the same climatic condition: sweet pepper (11.7 days), cucumber (10.4 days), bean (10.9 days) and tomato (11.6 days) plants (Zatyko & Martinovich 1986;Kasap 2002;Razmjou et al 2009;Atalay & Kumral 2013;Kumral et al 2017). In the current study, a remarkable result is that the development durations of some eggplant cultivars are very close to bean values which are the most suitable host for T. urticae (Kasap 2002).…”

“…In the current study, the oviposition period was found as 9.42-16.85 days and the number of eggs per female was 45.50-71.14. These durations and values were determined as 5-13 days and 85-276 eggs for tomato; 24 days and 231 eggs for bean; 19 days and 124 eggs for soybean; 21 days and 172 eggs in cucumber; 7-13 days and 22-56 eggs for sweet pepper plants (Kasap 2002, Dehghan et al 2009, Razmjou et al 2009, Atalay & Kumral 2013Kumral et al 2017). Compared the most favourable host plants, i.e.…”

Developmental Stages and Life Table Parameters of the Two Spotted Spider Mite,Tetranychus Urticae Koch (Acari: Tetranycidae) On Different Eggplant Genotypes.

“…Several studies indicated that the two-spotted spider mite does not accept all plants to the same degree (El-Sadan 2018). Many factors play an important role in plant acceptance (Kumral et. al., 2017).…”