OFA Bulletin May/June 2010 : Page 3

May/June 2010 • Numb e r 9 2 1 Table 1. Cost-benefit and cost-per-month rates. Fungicide Aliette WDG Banrot 40WP Banrot 8G Camelot Captan 50WP CHIPCO 26019 N/G Cleary 3336G Compass O 50 WDG Contrast 70 WSP Cygnus 50 WG Daconil Zn FLOWABLE Daconil ULTREX 82.5WDG Decree 50 wdg Disarm O Fenstop Heritage Medallion OHP 6672 50WP OHP 6672 4.5L Pageant Pipron Protect DF Segway Spectro 90 WDG Stature DM Strike 50WDG Subdue Maxx Subdue G Sulfur Systhane/Eagle Terrachlor 75WP Terrachlor 400 Truban 25 EC Truban 30 WP Zyban WSB Quantity 5 lbs 2 lbs 40 lbs 1 gal 50 lbs 2 lbs 30 lbs 0.5 lb 8 x 1 oz 1lb 2.5 g 6.5 lbs 2.5 lbs 1 lb quart 1 lb Cost $160 $73 $423 $124 $48 $95 $88 $263 $72 $253 $180 $88 $271 $100 $200 $525 8-1 oz packs $206 2 lbs 2.5 g 1 lb $49 $446 $80 quart 6 lbs 39.2 oz 5 lbs 25 oz 8 oz quart 25 lbs 30 lbs 8 oz 5 lbs 1 g quart 2 lbs 3 lbs $380 $80 $370 $124 $165 $90 $241 $133 $28 $75 $81 $92 $70 $70 $64 Rate 0.4-5 lbs/100 g 4-12 oz/100 g 8 oz-16/cu yard 3pt/100 g 1-4 lbs/100 g 1-6.5 oz/100 3-6 lbs/1000 sq ft 1-4 oz/100 g 3-12 oz/100 g 1-6.4 oz/100 g 2pt/100 g 1.4 lb/100 g 0.75-1.5 lbs/100 g 2-4 oz/100 g 7-14 oz/100 g 1-2 oz/100 g 1-4 oz/100 g 8-24 oz/100 g 20 oz/100 g 4-18 oz/100 g 4-8 oz 1-2 lbs/100 g 1.5-6 oz/100 g 1-2 lbs/100 g 3.2-12.8/100 g 1-8 oz/100 g 0.3-3 oz/100 g 8-75 oz/1000 sq ft 6 lbs/100 g 8-12 oz/100 g 3-6.5 lbs/1000 sq ft row 6-12 oz/100 g 3-8/100 g 3-12/100 g 16-24 oz/100 g that many of those “expensive” or “Cadillac” fungicides are more like hybrid vehicles, where savings are realized over the long haul. Keep in mind that the most expensive fungicide isn’t always the best and that proper timing of any fungicide is essential. Growers often reach for a fungicide when the crop is no longer salvageable; a fungicide may prevent future infections, but the damage may be such that the crop is no longer saleable. Ultimately, this is the most expensive O F A B u l l e t i n Application Interval 28 days 4-12 weeks at planting 7-14 days 7-10 days 7-14 days 14 days 14-21 days 14-21 days 7-14 days 7-14 days 7-14 days 7-14 days 14 days 28 days 14-21 days 7-14 days 7-14 days 7-14 days 7-14 days 7-14 days 7-14 days 14-28 days 7-14 days 10-14 days 7-14 days 30 days at planting 7 days 7-14 days 28-42 days 4-12 weeks 4-12 weeks 7-10 days cost/100 gal $13-160 $9-27 $8/cu yd $16- $1-4 $3-19 $9-18/1000 sq ft $33-131 $27-107 $16-104 $9- $19- $81-163 $13-25 $44-88 $33-66 $26-103 $12-37 $28- $20-90 $48-95 $14-27 $14-57 $25-50 $21-84 $11-90 $2-23 $3-25 $6- $75-113 $49-105/1000 sq ft $4-9 $7-18 $7-13 $21-32 cost/28 days $13-160 $3-27 $8-36 $32-64 $3-16 $6-76 $18-36 $49-263 $40-214 $32-414 $18-36 $38-76 $163-326 $26-50 $44-88 $49-132 $52-412 $25-148 $56-112 $40-360 $96-190 $27-108 $28-114 $50-200 $42-252 $22-360 $2-23 $3-25 $24- $150-452 $49-105 $3-9 $2-18 $2-13 $61-128 fungicide, as it wastes time, money, and creates unnecessary environmental impact. Janna Beckerman Department of Botany and Plant Pathology Purdue University 915 West State Street West Lafayette, IN 47907-2054 jbeckerm@purdue.edu 765-494-4628 3

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