[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.

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How to identify Early Blight
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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 tvb now,tvbnow,bttvb% P& j5 K) W/ k3 q

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。2 k9 A# W\" d0 h4 p% W
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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 公仔箱論壇8 b5 g3 t1 @. A2 b

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.公仔箱論壇7 r' }4 Z5 r) f: B
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How to identify Septoria Leaf Spot5.39.217.76( Z* T! {0 M' M  p/ t
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Symptoms of Septoria leaf spot also start

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. tvb now,tvbnow,bttvb" R- x9 y7 e  @+ b- i
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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5 j6 W  f# d- R8 p. I! U! G

and dead. Stems can also become infected but 公仔箱論壇- w+ [# \2 P+ A# S3 z/ w

infection of fruit is rare.

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How to Prevent and Control Early Blight and 公仔箱論壇$ k3 Z% D0 g; D9 {
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Septoria Leaf Spot

Follow the 12 easy steps below to enjoy a

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。( `) h) r. w! D: D
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Weed your garden. Some weeds,

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.公仔箱論壇' q& r& ?' ~* {9 Y
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Rotate crop locations. Don’t + ?$ y6 j9 p+ n# l6 B. {6 G

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! A, s1 M9 w2 I- H" C
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 5.39.217.767 l. p2 c9 f' ^2 P

fungus from the soil to your tvb now,tvbnow,bttvb% q9 ?+ [: v9 X
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plants.公仔箱論壇- J$ x& X! |1 ^. F4 r) R' N5 Z

Stake or cage plants to keep them 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& \  M$ L$ C; ]% F; |8 m$ A

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 5.39.217.76; |: W0 Z' i* `
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cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of tvb now,tvbnow,bttvb; V/ W7 \& p3 {* C' C6 P* @6 e  M4 L# u
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space above the soil without any leaves. Do not use - p) H! ]' P4 g/ g\" O. Z' G! g
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overhead watering. 公仔箱論壇8 ^: h% i* q0 d! F
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。: C) r5 }7 b9 d  q. X) 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 5.39.217.765 Q) @" V3 I* V, V. O$ H- Z
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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 公仔箱論壇5 e# I; _* B/ h
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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。% Z3 o+ l0 L% A5 W1 K; M

plants are more susceptible to disease.
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Remove and destroy or throw away diseased leaves, both off the 7 G6 O; \4 `: `8 _: D! Q

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early

enough. If a plant is heavily infected5.39.217.76' a6 S/ W/ s8 X6 D3 k8 W$ p* c. {
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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
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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。/ w- N! r( F* f3 I% ~

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。  M. B' t! E9 z- ~. R; }

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.tvb now,tvbnow,bttvb! p" [4 c) n  a# t

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Late Blight on Tomato Plants

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato / _. h' `! |0 t& h, G, p5 e

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。( O7 a# ~7 S$ ~% s$ q7 |0 t$ d
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,
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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 blight

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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