Abstract
Abstract Twenty-two insecticides were applied for control of Japanese beetle larvae in no-till corn. The test plot was planted into fescue sod on the UK Spindletop Research Farm on 4 May in a RBD with 4 replicates. Individual plots consisted of single rows, 24 m long, with 96.5 cm row spacing. All insecticides were applied at planting. On 25 Apr, 40 random 201 cm2 soil samples for the study area were examined for the presence of Japanese beetle grubs. Plant stand counts were recorded on 20 and 27 May. Numbers of cutworm and slug damaged plants were recorded on 20 May. Extended leaf heights were recorded from 10 plants per plot on 8 Jun. Numbers of pruned roots per 5 plants was recorded 23 Jun. Data were subject to ANOVA and treatment means compared to that of the control by Dunnett’s (SAS Institute). Percentage of cutworm damaged plants was transformed using the arcsin of the squareroot prior to analysis.
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