Evaluation of an Igr Insecticide, Rh-2485, for Control of Dbm and other Caterpillars on Head Cabbage, 1996
Abstract The insecticides were evaluated at the Kula Research Station, Maui Agricultural Park, from April to June. The field was set up in a RCB design with five treatments and four replications (blocks). Each treatment plot consisted of a single row of cabbage planted at 18 in. between plant spacing. Treatments were applied using a CO2 backpack sprayer set at 60 psi with an output of 100 gpa. One hollow cone nozzle (TX-26) was used per row The first treatment was applied five days after transplanting into the field on 23 Apr. Subsequently, six weekly applications were made until the week before harvest on the following dates: 30 Apr, 7, 14, 21, 28 May, 4 Jun. The treated check involved application of Bacillus thuringiensis aizawai (BTA) or Proclaim, using the University of Hawaii DBM resistance management protocol. The BTA product used was Mattach which was applied at 2.0 qt/acre on 23, 30 Apr, 7, 14 May. Proclaim 0.15EC was applied at 6.0 oz/acre on 21 and 28 May.