English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Spoke-injection of liquid insecticides (100% incorporation), was compared with conventional planting- and cultivation-time applications. Plots were established at Rhodes (silty clay loam) and Nashua (loam). A RCB design, with 4 replications, was used. All treatments were applied to single 50-ft length rows with 30-inch row spacing. Granular insecticide formulations were applied with modified Noble metering units mounted on a 4-row John Deere 7100 planter. Plantingtime liquid formulations were applied with a compressed-air delivery system built directly into the planter; 8003E nozzles delivered 10 gpa at 23 psi. Liquid cultivation-time insecticides were applied with a small-plot bicycle sprayer. Two 8003E nozzles, one on each side of the corn row, were positioned to deliver either a 7, or 15-inch band width around the base of the plants; 10 gpa at 10 psi. Broadcast applications of Furadan 4F were applied to single rows. A boom containing three 8002 nozzles (19-inch centers) delivered 13 gpa at 17 psi. One untreated buffer row was left on each side of each "broadcasted" row. Granular cultivation-time insecticide applications were made with electrically-driven Noble units mounted on the tool bar of a 2-row, rear-mounted cultivator. Plastic tubes, positioned directly in front of the cultivator sweeps, directed the insecticide granules to both sides of the corn row for basal treatments. “Spoke-injection” treatments were applied within several days of planting. The spoked applicator cylinder, mounted behind a small tractor, consisted of a 7-inch high-density polyethylene rod, with a 1.5-inch brass axle. Injection points (0.19-inch diam × 1.3-inch in length) were aligned in 10 rows on the cylinder, for a total of 220 points. A tension spring forced the points into the soil. Flat steel scrapers, positioned between rows of points, kept debris from interfering with the function of the spoke injector. Liquid insecticide was injected to a depth of ca. 1 inch using CO2; 20 gpa at 50 psi. Rootworm larval feeding was evaluated by digging 5 roots from each treatment row and rating them on the Iowa 1-6 scale (1 equal to no damage or only a few minor feeding scars, and a 6 rating equal to 3 or more nodes of roots completely destroyed). To determine treatment differences, data were analyzed using ANOVA and means were separated with Ryan’s Q test (REGWQ).

Spoke-Injection of Liquid Insecticides for Corn Rootworm Larval Control in Iowa, 1993