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Theoretical models predict that a parasitoid will stay for longer periods in high\u2010quality sites or patches than in those of low quality. In turn, patch quality may be linked to factors such as the number of hosts and the risk of predation. In the present study, we sought to determine if the factors of the number of hosts, risk of predation, and their interaction influence the foraging behavior of the parasitoid <jats:italic>Eretmocerus eremicus<\/jats:italic> (Hymenoptera: Aphelinidae) as theory predicts. To do this, we evaluated different parameters of parasitoid foraging behavior, such as residence time, number of oviposition events, and attacks, in sites of different patch quality.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Our results show that when the factors, number of hosts, and, risk of predation, were evaluated separately, <jats:italic>E. eremicus<\/jats:italic> resided for longer periods and oviposited more frequently in patches with a high number of hosts and low risk of predation than in other patches. However, when both of these factors were combined, only the number of hosts influenced some aspects of the foraging behavior of this parasitoid, such as the number of oviposition events and attacks.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>For some parasitoids like <jats:italic>E. eremicus<\/jats:italic>, theoretical predictions may be fulfilled when patch quality is linked to the number of hosts but will not be fully satisfied when patch quality is related to the risk of predation. Furthermore, at sites with different combinations of host numbers and risk of predation, host number appears to be more critical than predation risk. These results suggest that the performance of the parasitoid <jats:italic>E. eremicus<\/jats:italic> to control whiteflies will be mainly mediated by the levels of whitefly infestation and, to a small extent, by the risk of predation to which the parasitoid is subjected. \u00a9 2023 Society of Chemical Industry.<\/jats:p><\/jats:sec>","DOI":"10.1002\/ps.7617","type":"journal-article","created":{"date-parts":[[2023,6,16]],"date-time":"2023-06-16T10:15:40Z","timestamp":1686910540000},"page":"4208-4218","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Influence of the number of hosts and the risk of predation on the foraging behavior of the parasitoid <scp><i>Eretmocerus eremicus<\/i><\/scp>"],"prefix":"10.1002","volume":"79","author":[{"given":"Luis Enrique","family":"Chavar\u00edn\u2010G\u00f3mez","sequence":"first","affiliation":[{"name":"Laboratorio de Control Biol\u00f3gico, \u00c1rea de Insectos Fit\u00f3fagos y 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