![]() Liqui-Cop at 1 to 3 teaspoons/gal water.Cuprofix Ultra 40 Disperss at 1.25 to 3 lb/A on 5- to 10-day intervals.Cueva at 0.5 to 2 gal/100 gal water on 7- to 10-day intervals.Champ WG at 1.06 lb/A on 3- to 10-day intervals.24-hr reentry for greenhouse use 48-hr reentry for all other applications. Badge SC at 0.75 to 1.8 pints/A and 0.5 to 1.5 Tbsp/1,000 sq ft in greenhouses on 3- to 10-day intervals.Copper (Group M1) products are not recommended as stand-alone materials.Echo 720 at 1.38 to 2 pints/A on 7- to 10-day intervals.Bravo Ultrex at 1.3 to 1.8 lb/A on 7- to 10-day intervals.Bonide Fung-onil is available for home gardens.Chlorothalonil formulations (Group M5).Fontelis at 10 to 24 fl oz/A on 7- to 14-day intervals.Endura at 2.5 to 3.5 oz/A on 7- to 14-day intervals.Do not make more than two (2) sequential applications before alternating to a labeled fungicide with a different mode of action. Carboxamide (Group 7) formulations are registered for use.Use pathogen-free soil and equipment in the greenhouse or seedbed.Ĭhemical control Spray at regular intervals.Irrigate so that leaves dry fairly quickly.Alternatively, hot compost or incorporate into the soil soon after harvest. Remove and destroy plant debris at year-end.Maintain plant vigor and proper fertilization.Eradicate weed hosts and volunteer tomato plants. Rotate with nonhost crops for 3 to 4 years.Seedlings may have circular or elongated lesions with concentric markings on the stem, which will girdle the plant. ![]() Infected mature or immature fruit frequently fall from the plant. The dark, dry decay may extend some depth into the fruit. Older fruit develop dark, leathery, sunken spots that may be quite large with concentric markings similar to those on diseased leaves. Defoliation may be severe if environmental conditions are favorable, exposing the fruit to sun scald. Some spotting may be on older leaves early in the season, but the greatest injury usually is as fruit begins to mature. If spots are numerous, the entire leaf will be yellowed. Leaf tissue around the spots turns yellow. Spots enlarge to 0.25 to 0.5 inch in diameter, and they commonly show ridged concentric rings in a target pattern. Symptoms Small, irregular, blackish brown spots usually first appear on older leaves. The disease is not common in Oregon, particularly west of the Cascade Range. Infection is favored by temperatures of 75☏ to 84☏, high moisture, and low soil fertility. The fungus can survive on infected plant refuse in soil or overwinter on solanaceous plants. The fungus may be on or in seed, but internal infection is rare in seed produced commercially. solani), a fungus that may also attack horsenettle, nightshade, and other wild plants related to tomato. Potato ( Solanum tuberosum) - Early BlightĬause Alternaria tomatophilai (formerly A.
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