Aerial Application Control of the Sugarcane Borer, 1991
1992; Volume: 17; Issue: 1 Linguagem: Inglês
10.1093/iat/17.1.287a
ISSN0276-3656
AutoresC. A. White, H. P. Schexnayder, T. E. Reagan,
Tópico(s)Insect Resistance and Genetics
ResumoAbstract Insecticides were applied to plant cane varieties 'CP 74-383" (3 replications) and 'CP 70-331' (1 replication) at the Goldmine Plantation near Edgard, LA, for evaluation of season long SCB control. Experimental plots were 30 rows wide (1.8 m row spacing) and 152.4 m long (0.84 ha) arranged in a randomized block design (4 replications). Each treatment was applied in water using a Cessna Ag Truck with a swath width of 18 m (10 rows) delivering 18.7 liters of finished form/ha. The first application was made when 60% of the stalks exhibited visible intemodes above ground and SCB infestations exceeded the Louisiana State University recommended threshold of 5% of the stalks infested with live larvae in the leaf sheaths (17 Jun). Second (10 Jul), third (1 Aug), and fourth (21 Aug) applications were made when the SCB infestation exceeded this threshold in plots treated with Asana XL 0.66 EC. SCB damage was assessed by counting the number of bored internodes, exit holes, and total internodes from 60 randomly-selected stalks (4 locations of 15 stalks each) of sugarcane in each plot.
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