Guide For Tomatoes

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T O M AT O E S Fruit lesions grow large and usually have concentric rings. Diseased areas appear leathery and may be covered by a velvety mass of black spores. Disease Cycle The early blight fungus survives between crops on soil debris, on seed and on volunteer tomato plants and other solanaceous hosts. Primary infection occurs early in the season from conidia that are rain-splashed onto new seedlings. Lesions are visible two to three days after infection. Conidia formed on lesions serve as a secondary inoculum and are wind-disseminated. By late season, under favorable conditions for disease development, premature defoliation may occur. Conditions for Development Periods of mild, rainy weather are ideal for infection. Conidia require free moisture for germination that can occur in just 35 to 45 minutes at temperatures of 82º to 86º F. Heavy dew or frequent rains are necessary for abundant sporulation. Early blight is usually less severe on tomatoes grown under high fertility. E A R L Y B L I G H T 43
Gray Leaf Spot – G R A Y L E A F S P O T 44 Stemphylium solani, S. floridanum and S. botryosum f.sp. lycopersici Symptoms Immature lesions are barely visible and typically limited to the leaf surface itself. Circular to oblong brownish black specks are randomly scattered over the leaf surface and are unrestricted by veins. Occasional lesions develop on petioles and stems that are linear and parallel to the stem itself. Mature leaf lesions can reach 2 to 4 mm or more in diameter and may coalesce, killing large areas of the leaf blade. The center of leaf lesions may dry out and crack. The entire leaf may yellow and eventually defoliate. T O M AT O E S
Page 1 and 2: Disease Identification Guide For To
Page 3 and 4: T O M AT O E S Syngenta Crop Protec
Page 5 and 6: S E A S O N A L C A L E N D A R 4 D
Page 7 and 8: T R E AT M E N T S Treatments
Page 9 and 10: Actigard Recommendations for Tomato
Page 11 and 12: Bravo Weather Stik Recommendations
Page 13 and 14: The combination of certain environm
Page 15 and 16: Quadris Recommendations for Tomatoe
Page 17 and 18: Quadris Opti Recommendations for To
Page 19 and 20: Revus Top Recommendations for Tomat
Page 21 and 22: Ridomil Gold Bravo SC Recommendatio
Page 23 and 24: Ridomil Gold GR Recommendations for
Page 25 and 26: Ridomil Gold MZ WG Recommendations
Page 27 and 28: Ridomil Gold SL Recommendations for
Page 29 and 30: A N T H R A C N O S E 30 Anthracnos
Page 31 and 32: B A C T E R I A L S P E C K 32 Bact
Page 33 and 34: B A C T E R I A L S P O T 34 Bacter
Page 35 and 36: B L A C K M O L D 36 Black Mold - A
Page 37 and 38: B U C K E Y E R O T 38 Buckeye Rot
Page 39 and 40: D A M P I N G - O F F 40 Damping-of
Page 41: E A R L Y B L I G H T 42 Early Blig
Page 45 and 46: G R A Y M O L D 46 Gray Mold - Botr
Page 47 and 48: L A T E B L I G H T 48 Late Blight
Page 49 and 50: P O W D E R Y M I L D E W 50 Powder
Page 51 and 52: S E P T O R I A L E A F S P O T 52
Page 53 and 54: S O U T H E R N B L I G H T 54 Sout
Page 55 and 56: T A R G E T S P O T 56 Target Spot
Page 57 and 58: W H I T E M O L D 58 White Mold (Sc
Page 59 and 60: Syngenta Seeds R O G E R S
Page 61 and 62: T O M AT O E S Variety Description
Page 63 and 64: T O M AT O E S Variety Description
Page 65 and 66: Abbreviation Key: Fol: Fusarium wil
Page 67 and 68: T O M AT O E S Syngenta Resources S

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