ABSTRACT
Examination of light trap records spanning the period of agricultural change in the Philippines and Malaysia, as well as of contemporary records from areas in the Philippines that differ in the intensity of cultivation as is to be expected from the numerical and functional response of natural enemies. The spread of dry season cultivation has had a number of consequences for rice insects. The spread of dry season cultivation has had a number of consequences for rice insects. Insect pests and the diseases they vector have played a prominent role in the proliferation of IR varieties. In addition to resistance to pest attack, an important characteristic of modern varieties is their more rapid maturation. As the populations of most major pests typically increase through the season until the cessation of vegetative growth or senescence limits the infestation, shorter duration varieties planted in synchrony with the prevailing cropping pattern may suffer reduced attack.
