Tarbiat Modares University Journal of Crop Protection 2251-9041 10 3 2021 09 01 Resistance of different almond cultivars/genotypes to almond fruit wasp, Eurytoma amygdali (Hymenoptera: Eurytomidae) 535 545 1554 10.48311/jcp.2021.1554 EN Zarir Saeidi Department of Plant Protection, Agricultural and Natural Resources Research and Education Center, Chaharmahal and Bakhtiari, AREEO, Shahrekord, Iran. Journal Article Resistance of eight almond genotypes/cultivars, including Sefid, Mamaei, Rabie, Shahrood₇, Ferragnes, Shahrood₁₃, Nonpareil, and Hooreh, to almond fruit wasp (AFW) <em>Eurytoma amygdali </em>Enderlein, was investigated using choice and no-choice tests. The infested fruits ranged from 4.60 ± 1.45% in the Hooreh genotype to 86.87 ± 2.01% in the Ferragnes cultivar in the choice test. The highest and lowest premature dropped fruits were recorded in Ferragnes (80.70 ± 3.21%) and Hooreh genotype (2.43 ± 1.12%), respectively. The highest and lowest numbers of alive larvae were observed in Nonpareil (1.27 ± 0.70 larvae/fruit) and Ferragnes cultivar (0.04 ± 0.02 larvae/fruit). The No-choice test indicated the highest premature dropped fruits (79.21 ± 3.76%) and the lowest number of alive larvae (0.09 ± 0.03 larvae/fruit) in the Ferragnes cultivar. The olfactory response revealed that <em>E. amygdali </em>females were strongly attracted to fruits and fruit extracts of Mamaei and Ferragnes cultivars compared to the Hooreh genotype. Our finding demonstrated that certain chemical stimuli emitted from the unripe fruits of almond might influence the host finding behavior of AFW females. https://jcp.modares.ac.ir/article_1554_98986c005e5def2da341b4e0627d4712.pdf