Biodiversity of genus Orius (Hemiptera: Anthocoridae) in various climate regions and seasons of Kohgiloyeh and Boyerahmad province and evaluation of agro-ecosystem effects on their biodiversity

Authors

1 Department of plant protection, college of agriculture, Shahid Chamran University of Ahwaz, Ahwaz, Iran.

2 Department of plant protection, college of agriculture, Ramin agriculture and natural resources university of Khouzestan, Mollasani, Ahwaz.

Abstract

The members of genus Orius are known as natural enemies of many of plant pests in the world. We studied the fauna and biodiversity of the family Anthocoridae bugs in different environmental conditions of Kohgiloyeh and Boyrahmad province of Iran. Sampling took place in three climates and from three ecosystems (gardens, farms and virgin uncultivated lands) throught three replicationsevery other week. Species were identified based on male genitalia, and the biodiversity study was done using Shannon-Wiener dominance index through SDR software. The species Orius albidipennis (Reuter), O. niger (Wolff), O. laevigatus (Fiber),O. pallidicornis (Reuter),O. vicinus (Ribaut), O. horvati(Reuter) were identfied. The results showed that O. albidipennis was the dominant species in tropical climate and O. niger was the dominant species in cold climate. The Shannon-Wiener indices of tropical, moderate and cool climates were 1.245, 1.233, and 0.9896 respectively. Biodiversity of Orius spp in non manipulated ecosystems were significantly higher than manipulated (agricultural) ecosystems. Therefore biodiversities of the natural enemies were significantly affected by climate and ecosystem conditions.Regarding the side effects of ecosystem manipulating treatments on the biodiversity of the predatory bugs, some conservative treatments such as multi-cropping, rgeen islands of weed could enhance biodiversity and efficiency of predators.

Keywords

References

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Journal of Entomological Society of Iran
Volume 35, Issue 3
December 2015
Pages 1-14

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