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Articles

Effects of temperature on biological parameters of Anthocoris minki pistaciae (Hemiptera: Anthocoridae)Footnote

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Pages 240-245 | Received 15 Jun 2012, Accepted 24 Aug 2012, Published online: 01 Oct 2012
 

Abstract

The predatory bug – Anthocoris minki pistaciae Wagner – is associated with the common pistachio psylla, Agonoscena pistaciae Burckhardt and Lauterer, a major pest of cultivated pistachio trees in Iran. The biological parameters of A. minki pistaciae were determined under controlled conditions at five constant temperatures, including 17.5, 22.5, 25, 27.5 and 30 °C, 55 ± 5% relative humidity and the photoperiod of 16 light:8 dark hours. According to our data, the survival rate of eggs and nymphs was high at 17.5 and 22.5 °C, respectively; the length of the pre-oviposition period at 17.5 °C differed significantly from that at 27.5 °C. Furthermore, the study results revealed that female longevity as well as the oviposition period increased with the reduction of temperature. However, the fecundity of A. minki pistaciae did not differ significantly at all the tested temperatures ranging from 17.5 to 30 °C. The life table analysis of the predatory bug showed that both the intrinsic rate of natural increase (r m) and finite rates of increase (λ) rose with an increase in the temperature from 17.5 to 30 °C, while the population doubling time (Dt ) was affected by temperature adversely. To conclude, the results suggest that the populations of A. minki pistaciae tested in the present study are better adapted to high temperatures.

Plėšri žiedblakė Anthocoris minki pistaciae Wagner minta pagrindiniu Irane auginamų pistacijų kenkėju – blakute Agonoscena pistaciae Burckhardt & Lauterer. Biologiniai A. minki pistaciae parametrai buvo įvertinti reguliuojamose aplinkos sąlygose, esant 17,5 °C, 22,5 °C, 25 °C, 27,5 °C ir 30 °C temperatūrai, 55 ± 5% santykiniam drėgnumui bei 16 šviesos ir 8 tamsos valandų fotoperiodui. Kiaušinėliai geriausiai išliko 17,5 °C, o nimfos – 22,5 °C temperatūroje. Laikotarpio iki kiaušinėlių dėjimo trukmė esant 17,5 °C ir 27,5 °C temperatūroms patikimai skyrėsi. Patelių gyvenimo trukmė ir kiaušinėlių dėjimo laikotarpis ilgėjo krentant temperatūrai. Tačiau A. minki pistaciae produktyvumas temperatūrai kintant nuo 17,5 iki 30 °C patikimai nesiskyrė. Žiedblakės A. minki pistaciae vidutinės tikėtinos gyvenimo trukmės analizė parodė, kad temperatūrai kylant nuo 17,5 °C iki 30 °C didėjo biotinis rūšies potencialas (rm ) ir populiacijos augimo rodiklis (λ). Temperatūros poveikis populiacijos padvigubėjimo trukmei (Dt ) buvo neigiamas. Apibendrinant, šio tyrimo rezultatai rodo, kad tirtos A. minki pistaciae populiacijos yra geriau prisitaikiusios prie aukštų temperatūrų.

View correction statement:
Corrigendum

Acknowledgements

We greatly appreciate the support of this research received from the University of Tehran and the Pistachio Research Institute of Iran.

Notes

This article was originally published with errors. This version has been amended. Please see Corrigendum (http://dx.doi.org/10.1080/21658005.2012.754120)

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