Evaluation of Systemic Insecticides for Control of Insect Pests of Soybeans, 1982

• Published in: Insecticide and acaricide tests 1983-01, Vol.8 (1), p.214-214
• Main Authors: Linduska, James J., Dively, Galen, Embrey, Michael, Bean, Richard A.
• Format: Article
• Language: English
• ISSN: 0276-3656
• DOI: 10.1093/iat/8.1.214a

Soybeans were planted May 21 with a conventional 4-row planter (John Deere Model 71) equipped with Gandy granular insecticide applicators. Except for the Furadan treatments which were applied in the furrow, all other treatments were applied in a 14-in band over the seed furrow, behind the press wheel. Two drag chains were attached behind the press wheel of each planter. Plots consisted of 8 rows (4 rows of treated soybeans buffered on either side by 1 row of untreated soybeans and 1 row of untreated Bush Blue Lake snap bean), 100 ft long with 30 in between rows, arranged in a randomized complete block design with 4 replications. The center 4 rows served as the record rows. Soil was classified as a ‘Bertie’ silt loam and the soil temp at the time of planting was 82 F at the 6-in depth. Natural populations of Mexican bean beetle and Japanese beetle were monitored throughout the season. At mid-bloom 12 plants were selected at random following an ‘x’ pattern in each plot. Each plant was rated visually to the nearest 10% defoliation. Yield data were taken from 2-rows, 10 ft long, in the center of each plot. Yields were adjusted to 13% moisture and reported in bu/acre.