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2022 Midwest Vegetable Guide

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Celery – Diseases Midwest Veg Guide 2022 89 Fertilizing pH: Maintain the soil pH above 5.5 in muck soils and 6.5 in mineral soils. Before planting, apply 40 pounds N per acre, 0 to 230 pounds P 2 O 5 per acre, and 0 to 500 pounds K 2 O per acre based on soil test results and recommendations from your state. Celery is responsive to B. Apply 2 to 4 pounds of B per acre in banded or broadcast fertilizer to avoid stem cracking. Banding fertilizer at transplanting can help when soil is less than 55° F. In these cases, band up to 40 pounds N per acre, up to 100 pounds P 2 O 5 per acre, and up to 40 pounds K 2 O per acre, and subtract those amounts from the preplant application. Sidedress with 40 to 50 pounds N per acre two or three times, three or four weeks apart, starting six weeks after transplanting, or apply equivalent amount of N through fertigation. Reduce the amount of fertilizer N applied by the value of N credits from green manures, legume crops grown in the previous year, compost and animal manures, and soils with more than 3 percent organic matter. The total amount of N from fertilizer (including starter) and other credits should be 200 pounds per acre on mineral soils and 150 pounds per acre on muck soils Use overhead sprinkler or drip irrigation to apply water frequently to the shallow-rooted crop. If the soil gets too dry, physiological disorders such as blackheart (a calcium deficiency), will develop. Harvesting Once celery reaches marketable size, there is a narrow harvest window (about six to eight days) before quality declines significantly. Both fresh market and processing celery can be harvested either by hand or mechanically. Time from transplanting to harvest ranges between 100 and 130 days. Harvest celery by pulling the entire plant. Cut off the roots and trim the tops. Wash if necessary and cool quickly with water or forced air. Maintain a cold chain to market for best quality. Ideal storage conditions are near freezing and high humidity. Celery – Diseases Reviewed by Dan Egel, Mary Hausbeck – Sept 2021 Recommended Controls Anthracnose of Celery - Colletotrichum Fungus Disease and symptom development are favored by periods of warm temperatures (>68 F) combined with high humidity. Symptoms include curled/cupped leaves, sporadic leaf margin discoloration, twisted petioles and small, oval lesions on petioles. Symptoms of anthracnose can be confused with those associated with aster yellows except that the affected foliage remains green. Pesticide azoxystrobin products (azoxystrobin) | Products include AzoxyStar, AframeTM , Satori Fungicide , Gold Rush, Dexter SC, Quadris Flowable, Acadia 2 SC, Heritage, Tetraban Fungicide, Willowood Azoxy 2SC. See product labels for various rates. REI: 4-hour. PHI: 0-day. FRAC 11. Cabrio EG (20) (pyraclostrobin) | 12-16 oz. per acre. Do not apply more than 0.8 lb a.i. pyraclostrobin (64 oz. Cabrio) per acre per season. Do not make more than two (2) sequential applications of Cabrio before alternating to a labeled non-Group 11 fungicide with a different mode of action. REI: 12-hour. PHI: 0-day. FRAC 11. Merivon (fluxapyroxad, pyraclostrobin) | 4-11 fl. oz. per acre. REI: 12-hour. PHI: 1-day. FRAC 07, FRAC 11. Pristine 38WG (boscalid, pyraclostrobin) | 10-15 oz. per acre. REI: 12-hour. PHI: 0-day. FRAC 07, FRAC 11. Rhyme (2.08SC) (flutriafol) | 5-7 fl. oz. per acre. Apply preventively or when conditions are favorable for disease development. Do not apply more than 4 applications per year. REI: 12-hour. PHI: 7-day. FRAC 03. Topguard EQ (SC) (flutriafol, azoxystrobin) | 6.0-8.0 fl. oz. per acre. Not a single application may exceed 8 fl. Oz. of product per acre. Do not apply more than 4 applications per year. REI: 12-hour to 3-day. PHI: 0-day. FRAC 03, FRAC 11.

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