Soil Systemic Vs. Foliar Insecticide Combinations and Sunflower Seed Yield, Trial 1, 1986

Sunflower seed was planted on 20 May at the Northwest Experiment Station, Crookston, Minn. Plots were 4 rows × 30 ft, replicated 4 times, and arranged in a randomized complete block design. Liquid and granular soil systemics were applied in a 4-to-6-inch band 48 h after seeding and were covered with soil. Soil moisture in these finely textured soils was excellent. Foliars were applied on 26 Jun and 10 and 27 Jul using a hand-held C02 sprayer with 40 psi pressure and 17 gal total material/acre. Larval counts were taken 15 Jul. Plant height, stem infestation (not reported), and percent lodging were measured the third week of August. Yields were collected from a 5- × 10-ft area in the center 2 plot rows.