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Applications of registered and experimental insecticides to control chinch bugs were evaluated on commercial fields at Sidney (Fremont County) and Mineola (Mills County), both in extreme southwestern IA. Treatments were replicated 3 times and arranged in a randomized complete block design. Plots were 4 rows by 10 m. Replications and plots within replications were arranged end-to-end in single file so that all plots were 12 rows from adjacent wheat. Treatments were applied using a back-pack sprayer equipped with drop nozzles and Teejet 65015 tips directed at the base of the plant from either side of the row. Materials were applied at 30 psi pressure with 30 gal/acre. Plots at Sidney were treated Jun 17 and evaluated on Jun 18 and 21. Plots at Mineola were treated Jun 25 and evaluated Jun 26, 28 and Jul 2. All counts were made by counting the number of chinch bugs per plant on 10 plants selected randomly from the middle 2 rows of each plot. Nymphs and adults were grouped. Chinch bug numbers above 100 were estimated visually.

Treatments were replicated 4 times and arranged in a randomized complete block design in a commercial no-till field at Farley, Dubuque County, IA. Plots were 8 rows by 20 m. Treatments were applied using a CO2propelled back-pack equipped with TeeJet 11004 tips. Materials were applied at 20 psi pressure and 15 gal/acre. Applications of Lorsban 4E (1 lb ai/acre) were made 3, 7, 11 and 20 days following the application of Roundup (1.5 lb acid equivalent/acre) to control a heavy infestation of wirestem muhly, Muhlenbergia frondosa(Toir) Fern. Corn was planted Jun 3, 7 days following herbicide application and was in the spike stage on the date of the final Lorsban application. Other Lorsban applications were made preemergence. Plots were evaluated Jun 22 and Jul 1. Infestations were recorded as the total number of infested plants per 17.4 ft in the center of each of the 2 middle rows of each plot. Stand counts were taken as part of each evaluation.

Applications of registered and experimental insecticdes to control stalk borer were evaluated in a commercial no-till field at Farley, Dubuque County, IA. Treatments were replicated 4 times and arranged in a randomized complete block design. Plots were 8 rows by 20 m. Treatments were applied using a CO2propelled back-pack equipped with TeeJet 11004 tips. Materials were applied at 20 psi pressure and 15 gal/acre. Foliar sprays were applied Jun 14, 17 days following the application of Roundup at 1.5 lb acid equivalent/acre to control a heavy infestation of wirestem muhly, Muhlenbergia frondosa(Toir) Fern. One treatment of Counter was banded over the whorl on Jun 21. Plots were evaluated Jun 22 and Jul 1. Infestations were recorded as the total number of infested plants per 17.4 ft in the center of each of the 2 middle rows of each plot. Stand counts were taken as part of each evaluation.

Sixteen sarcoptes mange mite positive hogs, approximately 3.5 mo old, were split into 4 groups of 4 animals per treatment. The treatment groups were isolated from each other by housing each group in separate pens. The treated groups were sprayed to run-off with the following materials on 18 Mar and again on 2 Apr using a power sprayer delivering 120 psi at a rate of 1 pt finished spray per animal: 0.03% Lindane, 0.025% Ectiban and 0.05% Ectiban. Treatments wee applied particularly on the ears, flanks and dorsal mid-line. The wails, doors and gates of the inside and outside pen areas where hogs rub were also sprayed to kill any free-living mites. The control group and their pen were not treated. Three, approximately 1 inch scrapings, were taken from inside the ears and examined for mange mites microscopically. Treatment assessment was made on day 7 following the first treatment, immediately prior to the second treatment and day 28 and day 56 following the second treatment.