Abstract: The relationship between mature larval mass of oil tea weevil (Curculio chinensis) and fruit volume of its host plant oil tea (Camellia meiocarpa) was fitted with Logistic equation in order to understand the restriction of host fruit size on large larval growth and development of the weevil. The results showed that the larval mass increased with the increasing host fruit volume, which was in good conformity with the Logistic model. The weevil larval growth followed the principle of diminishing marginal utility, and it could be divided into two periods, the fastgrowing period (<3.216 cm³, one larva per fruit; <4.747 cm³, two larvae per fruit ) and the asymptotic growing period (>3.216 cm³, one larva per fruit; >4.747 cm³, two larvae per fruit). The minimum fruit size threshold was 1.500 cm³ for one larva per fruit, and 2.539 cm^3 for two larvae per fruit. The temporal pattern that the mature larvae exited from their host fruits was established, the number of larvae escaping from their host fruits decreased daily after the fruit collection, and the larval escaping peak largely appeared from 6:00 to 10:00 AM with 43.9% of total escaping number, and especially from 7:00 to 8:00 AM with 21.1% of total escaping number. The bigger the larvae, the earlier exited from their host fruits. The restriction of fruit size on growth and development of oil tea weevil was observed, and it should be a behavioral adaptation strategy to increase the offspring’s fitness for the parental weevil adults to oviposit on the bigger fruits.