Population dynamic and damage of the Mealy Almond Aphid Hyalopterus amygdali on thirteen commercial cultivars of almonds in Chaharmahal and Bakhtiari Province, Iran

Articles in Press

Document Type : Paper, Persian

Authors

1 Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, Iran.

2 Department of Plant Protection, Faculty of Agriculture, Bu-Ali Sina University, Hamedan, I. R. Iran

3 Department of Plant Protection, Chaharmahal and Bakhtiari Agricultural and Natural Resources Research and Education Center, AREEO, Shahrekord, Iran

10.22117/jesi.2025.366918.1657

Abstract

Aphid Hyalopterus amygdali (Blanchard, 1840) is one of the important pests of almond in Chaharmahal and Bakhtiari province. Population fluctuation and damage caused by this aphid were studied during two years (2022- 2023) on thirteen commercial cultivars of almonds in this province. The study of population fluctuation showed that in both of the years, activity of the aphid was started on the almond trees in late April, and population peak was observed in May and June. The average density of aphid population in the first year of was higher than the second. In 2022, the cultivars Mamaei (42.71 aphids), Shahrood 13 (40.08 aphids), and Rabei (37.64 aphids) respectively had the highest average density of aphids per branch (sampling unit), whereas Shahrood 21 (7.14 aphids), Aidin (8.17 aphids), and Araz (10.63 aphids) had the lowest average density of aphids per branch, respectively. In 2023, the highest average density of aphids per branch was recorded on Shahrood 13 (46.42 aphids), Mamaei (41.68 aphids), and Rabei (20.42 aphids), whereas the lowest average density of aphids per branch was on Shahrood 21 (0.80 aphids), Araz (0.92 aphids), and Aidin (1.12 aphids). Based on cluster analysis which conducted based on the average population of the aphids and the average damage index, Shahrood 13 and Mamaei were classified as sensitive cultivars, whereas Shahrood 21, Aidin, and Araz cultivars were classified as resistant cultivars in both of the years. The use of resistant cultivars is recommended in the management of this pest.

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© 2025 by Author(s), Published by the Entomological Society of Iran

This Work is Licensed under Creative Commons Attribution-Non Commercial 4.0 International Public License

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Available Online from 11 July 2025

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