[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 , V4 D# g; I! i6 t$ p! c5 l. i

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.
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How to identify Early Blight

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 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。/ i  n$ b0 j! m* q
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 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。6 e1 w$ |0 l: m  T! T0 G, {) p

leaves may fall off. Extensive loss
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.7 J. R% W" V  ^: e8 F$ o5 ^
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How to identify Septoria Leaf Spot

Symptoms of Septoria leaf spot also start
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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 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 l- U  t) e2 X, B% D9 k

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 公仔箱論壇) @* B0 V1 \% ^! S$ ~9 c. R$ p
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Small dark spots, the fruiting bodies of the fungus
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
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and dead. Stems can also become infected but tvb now,tvbnow,bttvb\" v: W  o2 I$ L. z4 l( z
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infection of fruit is rare.

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How to Prevent and Control Early Blight and
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Septoria Leaf SpotTVBNOW 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。2 |0 ]) G; I; d/ s& s& m. l; X, K
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Follow the 12 easy steps below to enjoy a

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds, 公仔箱論壇  p2 l' \9 u+ h7 `

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.tvb now,tvbnow,bttvb) [3 q1 o# u/ F5 J
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Rotate crop locations. Don’t

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 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。' m5 ^* C, t' A1 E5 i$ g

where tomatoes were grown.

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇3 z/ A2 R3 y9 J& J
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 5.39.217.769 ]( E! Y1 |/ }7 b* f0 v# F

fungus from the soil to your tvb now,tvbnow,bttvb7 G) U9 ?. Y4 I, k: M  E. D
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plants.

Stake or cage plants to keep them 5.39.217.76" I3 S5 a4 t% t) D. o' P5 X

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and / @7 m& Z* G9 u( K; G

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of

space above the soil without any leaves. Do not use

overhead watering. 公仔箱論壇; g. X# i1 H% Y; m+ ?+ A
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. tvb now,tvbnow,bttvb) T1 L% Y8 U2 A5 u7 U7 R
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
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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 5.39.217.76# T6 N( v' f; A# R9 Y8 G4 ]

wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early

enough. If a plant is heavily infected* ?6 R\" F. |0 D. d2 Q! P\" q9 J, z) S

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 公仔箱論壇. O5 M- x7 P6 _8 G/ j6 ]1 V' U( @9 [
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to remove diseased leaves should be disinfected before being used on a different plant.% B5 N# {: Y4 H  J+ o* S
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Spray plants to prevent and control the

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try tvb now,tvbnow,bttvb$ V0 R# A& |, t7 y

GreenCure.公仔箱論壇0 U1 J. t1 |2 h% c( l" A1 a
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Late Blight on Tomato PlantsTVBNOW 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。5 h$ ~( ?. S9 O) y1 B. I$ f% K

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 5.39.217.76" x3 A+ ^' I$ R7 m, {3 x4 K+ ]
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plants in a garden. Once a tomato 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。4 j" L9 f& S8 W) {% N$ m! Y) U

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, . q' k* B* z& f9 i* F# T6 I  i
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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 blighttvb now,tvbnow,bttvb6 ^3 i7 }* S3 `
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 5.39.217.76- }+ N8 A- O6 m/ V* p
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Septoria leaf spot infections will also help prevent late blight infections.

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