[en] Field test of carbofuran insecticide (2,3-dihydro-2,2-dimethyl-7-benzofuranyl-N-methylcarbamate) controlled release formulation on rice plants of IR-64 variety was carried out in Pusakanegara, West Java. This insecticide formulation was made by using the mixture of activated charcoal, tapioca, kaolin, Na-alginate as a filler matrix. Insecticide formulation was applied one week after transplanting. The observations were conducted on the number of tillers, damage level caused by Orseolia oryzae (Wood/Mason), Chilo suppressalis (Walker), and Cnaphalocrosis medinalis (Guen) on new young plants. The observation were carried out on three weeks after application of carbofuran insecticide formulation then every two weeks until harvest. The number of tillers were occurred at the treatments of controlled release formulation of 20kg/ha, 30kg/ha, and 40kg/ha dose rate on the third weeks, it was showed significant difference compared with commercial carbofuran, and the following weeks were no significant difference between the treatments. The attack of Orseolia oryzae was occurred at the treatments of controlled release formulation with dose rate of 30 kg/ha and 40 kg/ha on the seventh weeks, ninth weeks, and eleventh weeks, those attacks were significantly difference found compared with commercial carbofuran. The attack of Chilo suppressalis was occurred at the treatments of controlled release formulation of 40kg/ha dose rate on the fifth weeks, it was showed significant difference which was compared to untreated carbofuran. The attack of Cnaphalocrosis medinalis was occurred on the ninth weeks, three dose rate of controlled released formulation were showed significant differences which compared with commercial carbofuran and were showed 50% less than commercial carbofuran, while the grains dry weight were no significant difference between the treatments. (author)