The objectives of this project are to investigate the approach by the cultivators to utilize the natural enemies, namely, the predatory stink bug (Eocanthecona furcellata) and the egg parasitoid (Trichogramma spp.), in the organic rice paddy and organic cruciferous crops, in the upper northern provinces of Chiang Rai, Phayao, Chiang Mai, Mae Hong Son, Lamphun, Lampang, Phrae and Nan, covering the areas of con-ventional cultivation using pesticides and the areas adopting organic cultivation; to evaluate the cultivator perception and acceptance, benefit from using the natural enemies; and to produce a handbook to accom-pany the commercial supply of these natural enemies. A group of 50 cultivators in each province was re-cruited to take part, thus totaling 400 cultivators. It was revealed that 81.25% knew and wanted to use the natural enemies and 72.21% considered that control was necessary and wanted to use the natural enemies. In the investigation, the major insect pests found on rice were the rice stem borer complex, the leafhopper and planthopper complex and other insect pests. Over 20 species of the natural enemies found were the hymenopterous parasitoids, insect predators such as the coccinellids and spiders. The entomopathogens fungi were found the rice green leafhoppers and the rice gall midge. The major insect pests found on cru-ciferous crops were aphids, flea beetle and lepidopterous pests such as beet armyworm, common cutworm, cabbage webworm, caterpillar cabbage looper. Among them the most important one was the diamondback moth. The natural enemies found were the egg parasitoid, larval and pupa; parasitoids. The predators found were the coccinellids, predatory stink bug, earwig and syrphid fly maggot. Studies on ecology, population dynamics and diversity of the insect pests and their natural enemies indicated that the natural enemy popu-lation density was dependent on the fluctuation of the insect pest population density in the rice paddy as well as in the cruciferous crops. But the natural enemy density was not high enough thus warrant an aug-mentative biological control. The results of this investigation indicated that the cultivators wanted to adopt a non-chemical pest control, knew and wanted to utilize natural enemies, and therefore justifying their com-mercial production in order to meet the demand of the organic rice and cruciferous crop cultivators.