Avicta seed treatment for root-knot nematode management on corn in central Alabama, 2007

摘要

The seed treatment Avicta was evaluated for the management of the root-knot nematode on corn in at the Brewton Experimental Field located near Brewton, AL. The field had a long history of root-knot nematode infestation, and the soil type was classified as a sandy loam. Plots consisted of 2 rows, 7.6 m long, with 0.9 m row spacing and were planted in a randomized complete block design with five replications. Blocks were separated by a 6.1 m wide alley. Counter 15 G (9.4 kg/ha) was applied at plantingon 26 Mar in the seed furrow with chemical granular applicators attached to the planter. All plots were maintained throughout the season with standard herbicide, insecticide, and fertility production practices as recommended by the Alabama Cooperative Extension System. Population densities of the root-knot nematodes were determined at monthly intervals. Ten soil cores, 2.54 cm diam and 15 cm deep were collected from the two rows of each plot in a systematic sampling pattern. Nematodes were extracted using the gravity sieving and sucrose centrifugation technique. Seven weeks after planting, 5 root systems were dug from each plot and nematode eggs were removed using a 0.6% sodium hypochlorit solution. Plots were harvested on 11 Sep. Data were statistically analyzed by GLM and means compared using Fisher’s protected least significant difference test (P <= 0.10).