Effect of insecticidal and repellency of extract of Rhazya stricta Decne and Nerium oleander L. on common pistachio psyllid (Aganoscena pistaciae) under laboratory condition

Document Type : Research Paper

Authors

1 Department of Biodiversity, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran.

2 Department of Biodiversity

3 2. Department of Plant Protection, Kerman Agricultural and Natural Resources Research and Education Center. Kerman. Iran

Abstract

Common pistachio psyllid, Agonoscena pistaciae (Hemiptera: Aphalaridae), is one of the most important pistachio orchards in Iran. It can cause irreparability damage to pistachio with sever feeding of phloem of leaves and buds. This research carried out to study direct effects of ethanolic extract of eshvarak and oleander on fifth nymphal instar. Bioassay test with direct spry method on nymphs was used to determination of mortality and LC50. Also, repellency percentage of adult insects was calculated with two plant extracts by Talukder and Howse formula. All experiments were done in completely randomized design. Based on the results, LC50 of oleander and eshvarak were 142 and 109 miligram per liter (ppm) respectively. The highest mortality of nymphs in concentration of 750 miligram per liter of oleander extract was 63.81±1.24% and in concentration of 600 miligram per liter of eshvarak extract was 71.62±1.24%. Moreover, the results showed the repellency percent of eshvarak more significantly affect than oleander in all concentrations. Repellency percent of adult psyllids affected in both concentration of 10000 ppm of eshvarak and oleander were 88.75±1.34% and 71.25±1.55 % respectively.

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Volume 35, Issue 2
June 2022
Pages 308-325
  • Receive Date: 16 May 2020
  • Revise Date: 05 October 2020
  • Accept Date: 14 January 2021
  • First Publish Date: 01 March 2021