Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

An insecticide test to control the sugarcane beetle borer (Coleoptera: Curculionidae).

Abstract

Aldrin, dieldrin and carbaryl, applied as granules and in apple pomace baits, were tested in 1968 for the control of Rhabdoscelus obscurus (Boisd.) on sugar-cane in the Hawaiian island of Kauai. Borer damage was reduced for at least nine months by aldrin at 3 and dieldrin at 2 lb toxicant/acre, but after this it increased on the treated plots until it was equal to the damage rate on untreated plots at harvest. Residues of 0.01-0.03 p.p.m. aldrin and 0.08-0.92 p.p.m. dieldrin were found on the soil surface. The insecticides did not adversely affect parasitism of Rhabdoscelus larvae by the Tachinid Lixophaga sphenophori (Villen.), but they reduced populations of the predatory ant Pheidole megacephala (F.).<new para>ADDITIONAL ABSTRACT:<new para>An experiment using aldrin, dieldrin and carbaryl, applied as both granules and with apple pomace bait, was conducted on the island of Kauai to control Rhabdoscelus obscurus. Both aldrin and dieldrin at 3.0 and 2.0 lb/acre, respectively, reduced borer damage for at least 9 months. However, the damage subsequently increased in the treated plots until it was equal to untreated plots at harvest. Residues on the soil surface at harvest were 0.01-0.03 p.p.m. aldrin and 0.08-0.92 p.p.m. dieldrin. The insecticides did not adversely affect parasitism of the weevil larvae by the tachinid, Lixophaga sphenophori, but they reduced the population of the predator ant Pheidole megacephala.