The objective of this study was to evaluate the effectiveness ofin-furrow insecticides for managing tobacco thrips, the dominantearly season pest of peanuts in Alabama. This study was conducted atthe Wiregrass Research and Extension Center, Clanton, AL. Peanut,GA O6-G, was planted on 9 May in single and twin rows (two rowswith 9 inch between an overall 36 inch spacing). Eleven treatments,including the untreated check, were arranged in an RCB design withfour replications. Peanut plots were 40 ft long with four treatedrows per plot and 25 ft alleys. At-plant in-furrow liquid insecticideswere applied on 9 May using a CO2 powered backpack sprayerwith nozzles mounted to spray in-furrow at 3 mph 15 psi at 10 gpausing size 35 orifices for twin rows and size 52 orifices for the singlerows. Ground-driven applicator boxes were used for applying granularinsecticides. Thrips damage ratings were determined on 18 Junby examining 10 random peanut terminal leaves using a 10-pointdamage rating (DR) system: 1 = no damage; 2 = 10% of emergingleaves infested or damaged; 3 = 20% of emerging leaves infested ordamaged; 4 = 30% of emerging leaves infested or damaged; 5 = 40%of emerging leaves infested or damaged; 6 = 50% of emerging leavesinfested or damaged; 7 = 60% of emerging leaves infested or damaged;8 = 75% of emerging leaves infested or damaged; 9 = 90%of emerging leaves infested or damaged; 10 = 100% of emergingleaves infested or damaged + dead plants. Peanut plots were invertedon 24 Oct and picked on 28 Oct using a two-row peanut combinethat weighed pod yield for each plot. The average DR and yield arereported in Table 1. Data were analyzed using ANOVA and meanswere separated using Fisher’s protected least significant difference(LSD, P 0.05).
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