Arthropod Management Tests 2014, Vol. 39 doi: 10.4182/amt.2014.E55 1 (E55) BROCCOLI: Brassica oleracea italica, ‘Heritage’ CABBAGE MAGGOT CONTROL WITH IKI-3106 (CYCLANILIPROLE), 2012 Frank V. Sances Pacific Ag Research 1840 Biddle Ranch Rd. San Luis Obispo, CA 93401 Phone: 805-594-1800 Fax: 805-594-1808 E-mail: frank@pacificaggroup.com Eric Flora E-mail: eric@pacificaggroup.com Amy Spence E-mail: amy@pacificaggroup.com Megan L. LeBlanc E-mail: megan@pacificaggroup.com Melvin Grove ISK Biosciences 2237 Haden Rd. Houston, TX 77015 Phone: (713) 393-3750 E-Mail: grovem@iskbc.com Sean D. Whipple ISK Biosciences 211 S Platte Clay Way, Suite B Kearney, MO 64060 E-Mail: whipples@iskbc.com Cabbage maggot (CM): Delia radicum (Linnaeus) This study was conducted to determine the efficacy of Cyclaniliprole 50 SL (IKI-3106) for control of cabbage maggots (Delia radicum) on transplanted broccoli plants placed 14 inches apart in two lines per 40 inch bed. Experimental treatments of Cyclaniliprole at rates of 20.66 g AI/acre, 24.30 g AI/acre, 30.44 g AI/acre, and 36.44 g AI/acre were applied to replicate plots by either drip (7 Nov, 21Nov) or directed soil (22 Oct) or foliar (7 Nov) sprays at 14-day intervals. Drip injection treatments were applied at a pressure of 8 psi at a dilution of 0.5 acre inch, wetting the entire surface of the 24 inch wide bed top. Directed spray treatment applications were performed using a CO 2 backpack sprayer with spray boom incorporating four TeeJet 8002 nozzles directed at the base of the plants targeting the adjacent soil within 2-3 inches of the plant, operating at a pressure of 50 psi at a dilution of 60 gpa. Experimental treatments were compared to the commercial standards, Radiant SC at a rate of 10 fl oz/acre and Lorsban Advanced at a rate of .775 l/acre (0.768 lbai/acre). Radiant applications were first directed, then applied through drip, and the third application was directed. The Lorsban treatment was applied first as a directed soil spray and then followed by two drip applications. Evaluations consisted of assessing five roots per plot for live maggot counts as well as root damage (0-10 scale with 10 representing maximum damage). Insect-day average was calculated using the formula Ʃ Ni-1 [(y i - y i-1)/ 2] x (t i – t i-1 ), where y = population, t = time and N is average insect population between two adjacent time points. All Cyclaniliprole treatments reduced maggot counts up to 83% (significant reduction on 47 days after final application) and were comparable with both commercial standards (Table 1). Likewise, maggot counts were significantly reduced by Cyclaniliprole treatments that were applied as two spray applications followed by drip (treatment 3) or as one spray with two subsequent drip applications (treatment 5), not different from to Lorsban and Radiant. Root damage was significantly reduced by Treatments #3 and #4 (Cyclaniliprole applied as two sprays with one drip in between) up to 53% (Table 2). Although no differences were shown Downloaded from https://academic.oup.com/amt/article/39/1/E55/194446 by guest on 23 June 2023