Temik 15G and Nemacur 15G In-Furrow Rate Test on Delta (Commerce Silt Loam) Soil, 1986

Abstract

Abstract Temik 15G and Nemacur 15G were tested at 0.5, 0.75 and 1.0 lb Al/acre for control of thrips and aphids on seedling cotton. Orthene 80SP seed treatments (6.4 oz (AI)/100 lb seed) with and without Terraclor Super × (TSX) and blended Di-Syston + TSX were included for comparison. Test plots were replicated 4 times in a randomized complete block design, at the Northeast Research Station, St. Joseph, LA. Plot size was 4 rows (40 inch spacing) × 65 ft. Cotton was planted on 30 Apr and fertilized with 90 lb N/acre applied preplant. Test treatments were applied in-furrow at planting with a John Deere 7100 planter, equipped with granular application split boxes. Terraclor Super × (Terraclor 1.0 lb + Terrazole 0.25 lb (AI)/acre) was applied with the Temik 15G and Nemacur 15G treatments, and one of the seed treatments, as a standard fungicide treatment for delta conditions. The Di-Syston treatment was a commercial blend with TSX. Major pest and/or secondary pest treatments were initiated in Jun and maintained on an 'as needed' basis through Aug. The effects of the test treatments on thrips and cotton aphids were measured by washing insects from 10 seedling cotton plants/plot onto 200 mesh screens, backwashing them onto lined filter paper (7 cm) and counting them with the aid of a binocular dissecting microscope. Leaf area measurements were made on 22 and 29 May with a Licor leaf area machine, measuring all leaves from 5 plants/plot that were removed from the field and immediately processed. Stand data were taken from the middle 2 rows of each plot in 20 ft flagged sections on 4 Jun. Plant height of 20 randomly selected plants within each plot was measured on 4 Jun. Yields were determined by solid picking the 4 row plots with a mechanical harvester on 20 Sep and 7 Oct.