[生活小百科] Early Blight and Septoria Leaf Spot on Tomato Plants

Early blight and Septoria leaf spot infections most commonly begin in the early or middle part of the growing season but , `# m* J, d- }* E

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.tvb now,tvbnow,bttvb+ A: |- u3 K5 D, k: n- F7 t

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How to identify Early Blight& y/ K" `, Z- {, N2 _: u0 g
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Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to
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newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown

in color and form concentric rings, or a
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow,

leaves may fall off. Extensive loss TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。% ]' q/ T) E0 A+ o: J

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.
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How to identify Septoria Leaf Spot9 Y+ h% n: J% `

Symptoms of Septoria leaf spot also start ) u" a5 N$ F$ D* {8 r0 K# W
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on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change
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shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center.

Small dark spots, the fruiting bodies of the fungus

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 公仔箱論壇- k. c8 A1 A. B

and dead. Stems can also become infected but
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infection of fruit is rare.
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How to Prevent and Control Early Blight and tvb now,tvbnow,bttvb; f( }, j\" a' @! b8 M; w
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Septoria Leaf Spot

Follow the 12 easy steps below to enjoy a * E) I9 v$ r7 v; G! \7 B  Q

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.

Weed your garden. Some weeds, TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。& V5 Y# h) l. D- Z4 Z0 D+ ~) v

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。7 E+ d6 P' W) |
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Rotate crop locations. Don’t % F& X: b+ f* p' N( N# ]

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas tvb now,tvbnow,bttvb9 p' O( U& i4 ?

where tomatoes were grown.5.39.217.76# z6 E1 `* @: n6 @$ t+ ?

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.' V4 }2 A* v5 ^
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of * g' m4 a! d( G, @4 J# A0 T% W% O

fungus from the soil to your

plants.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。! }) v. }( I/ c" C. h. H  N
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Stake or cage plants to keep them
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off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and tvb now,tvbnow,bttvb% q3 |; j. q* J; ^% z8 x* E

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of
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space above the soil without any leaves. Do not use
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overhead watering. 5.39.217.762 a8 b! w; u4 R% d2 u
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
Consider using a soaker hose or drip tape. Water in the early part of the day. This allows leaves to dry faster. Wet leaves allow 5.39.217.766 z$ E6 V. M6 u$ ]
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fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。% P/ n* ?2 z& V( N5 Y

wet. Keep your plants happy and healthy. Weak and stressed + c1 h/ z( j; l0 E

plants are more susceptible to disease.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。& W2 W: s+ @1 L3 Q; \8 Q
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Remove and destroy or throw away diseased leaves, both off the 3 V* e1 {( }6 |5 M& s7 ~

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early
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enough. If a plant is heavily infected
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, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。1 I; [# ?% \( Z* g
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to remove diseased leaves should be disinfected before being used on a different plant.TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。, g3 k7 J3 E* X3 g% a
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Spray plants to prevent and control the
TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。- u1 W' U\" X; I0 |\" e& u
spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try

GreenCure.) _+ |9 t6 r3 o3 r1 y$ U: r& d

Late Blight on Tomato Plantstvb now,tvbnow,bttvb. s% d  i( E6 e9 Y* m1 l# [. Z
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato tvb now,tvbnow,bttvb, \1 R# ^# k; Q+ f- L# S! G

plants in a garden. Once a tomato plant . q1 v" D) H& E) P) b  ~0 _2 G2 Q
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,

water-soaked spots on leaves and stems that grow and turn dark brown or gray. A white downy growth may develop on the underside of infected leaves. Late blight2 v- v# Z' M! r\" K9 j# o3 z7 }+ |
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and
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Septoria leaf spot infections will also help prevent late blight infections.

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