[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
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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.

How to identify Early Blight( m$ Q0 B. k  P0 K6 _2 p4 d$ _3 b

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to www2.tvboxnow.com5 Z  }+ M+ ?4 e

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown
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in color and form concentric rings, or a

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow,
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leaves may fall off. Extensive loss tvb now,tvbnow,bttvb/ g( d8 }5 X; W

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.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: H/ [* s: s& n5 e( E
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How to identify Septoria Leaf Spotwww2.tvboxnow.com! F2 y( ]$ |. u4 l9 O# O/ e- c$ n

Symptoms of Septoria leaf spot also start 公仔箱論壇9 O1 T0 ?* `: s7 L# q9 W# s3 @: V& a
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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

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. www2.tvboxnow.com5 g" ^  \2 ]4 A# D
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Small dark spots, the fruiting bodies of the fungus) r/ d+ v. p9 G2 h$ b+ _  ?

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry

and dead. Stems can also become infected but 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。8 D$ i: |1 k) E2 _7 S. A

infection of fruit is rare.

How to Prevent and Control Early Blight and

Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.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。+ V9 i/ _  Y) }6 x' _

Weed your garden. Some weeds, - w5 I, n  W0 w  s. l! Y

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.3 {% k6 O9 r4 l1 F3 `
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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
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where tomatoes were grown.公仔箱論壇2 l9 n9 w$ l5 V) k" |9 s

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.www2.tvboxnow.com8 R# ~9 z( a$ W) m" n
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of
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。- ^- N7 F: \- ]3 W( q$ H
fungus from the soil to your
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plants.
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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 公仔箱論壇- n: n2 g7 t6 Q. \% x9 i+ ]: V

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of + ?3 \- G5 I4 q; I) q

space above the soil without any leaves. Do not use www2.tvboxnow.com8 f' n) ]6 |\" L- L  ^
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overhead watering.
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto 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。; V8 V+ Q9 {: a! r2 k
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 + ?, N: ~" y3 s8 h2 `2 p
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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 www2.tvboxnow.com: R; t4 q0 r3 c0 o

wet. Keep your plants happy and healthy. Weak and stressed 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。2 t1 N  n- L! W

plants are more susceptible to disease.
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Remove and destroy or throw away diseased leaves, both off 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。5 J) v! _7 a3 N- O. E
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early www2.tvboxnow.com. S! V" \7 H/ E% {( j1 N
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enough. If a plant is heavily infected

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used
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to remove diseased leaves should be disinfected before being used on a different plant.

Spray plants to prevent and control the
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try ' t% `$ z; ?& C/ M! t4 g+ G: B
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GreenCure.www2.tvboxnow.com' P+ v9 p$ d$ R0 S! m

Late Blight on Tomato Plantswww2.tvboxnow.com7 M3 u! K6 s" N1 g4 W" i

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato ! L( N4 g- i, \2 e

plants in a garden. Once a tomato plant

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, tvb now,tvbnow,bttvb# ^, }6 j: o0 R  l- _, Z

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 blight
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and

Septoria leaf spot infections will also help prevent late blight infections.

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