Abstract:The Indian meal moth (Plodia interpunctella) is the major economic insect pest of stored Masson pine pollen products. This paper deals with the biological characteristics of the insect feeding Masson pine pollen. By one-year’s observation on P. interpunctella in Fuyang City of Zhejiang Province, it is found that the P. interpunctella reproduces five generations per year and the mature larvae hide in gaps of deposits such as boxes, interior wall, furniture and paper packing for overwintering. Both the adult and larvae behavior are of extremely agile and can quickly fly or climb away from the store materials, with strongly spreading ability. Overwintering adult emergence shows two main peak periods in May 12-13 and May 22-23 respectively. The adult emergence peaks of the first, the second, the third and the fourth generation are July 3-4, July 28-29, August 27-29 and October 5-6 respectively. The average mating duration of adult is 75.8 minutes per time. The female adult lays eggs after mating and the average amount is 128 eggs per female. The mean life of adult is 8.0 days and female-male ratio is 1.0:1.2. The average duration of eggs is 4.9 days. The mean crawling speed of the mature larvae is 25.2 cm·min-1, and the number of straight crawling insects occupies 62.5% of the total. Feeding of per larva is 0.055g of pine pollen tablet. The larvae migrate to find new food sources when lack of food or to find hidden places to pupate as maturing. The average pupating duration takes 9.9 days.