Effect of Ronnel upon the Adult Rice Weevil, Sitophilus oryza12

Abstract

Laboratory studies using Hard Red Winter wheat treated at 1.85 and 4.00 p.p.m. with ronnel, sampled as Korlan 24 E, produced mortalities of 50% and 95%, respectively, immediately following a 14-day exposure. A dosage of 1.00 p.p.m. produced a mortality of only 7% but reduced reproduction approximately 94%. Odor, feel or appearance of the wheat was unaffected at. 5.0 p.p.m.; however, 10.0 and 25.0 p.p.m. produced odors.