[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" R* u# N; \' h& L( W- ~

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 5.39.217.76( J! @6 |% M; G1 J! c# C$ {
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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 + r$ s0 p+ x( K3 y( c3 ~5 K3 |/ S! X% r3 l9 ~
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in color and form concentric rings, or a 公仔箱論壇1 U0 n7 r+ H1 W( a8 X6 G

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。3 G  u" q& B  U% r' |7 C; t

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.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 C- T8 t: _+ j; u/ Z" @: [

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How to identify 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。: \% c3 n% L1 w0 [
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Symptoms of Septoria leaf spot also start 公仔箱論壇6 o0 M+ T& U7 V9 X7 w

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. & F6 d4 g# V% r

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 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。) l- g! |  m4 v% m

and dead. Stems can also become infected but 5.39.217.76. y3 T5 d0 Q+ D\" p0 j8 s

infection of fruit is rare.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。/ ^0 X6 X0 ~( R: |3 z6 \

How to Prevent and Control Early Blight and

Septoria Leaf Spot5.39.217.76$ b5 ^8 C! X6 x2 V9 ?

Follow the 12 easy steps below to enjoy a 5.39.217.76, d0 b* Y! e( f# A( i
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds,
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.5.39.217.762 j5 C* S' j) U

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 公仔箱論壇  `9 B7 D8 P, T  z* |8 d3 x
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where tomatoes were grown.: s" }4 k; H- g# x8 \

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 tvb now,tvbnow,bttvb: \8 m2 s% Q/ o& Q* L  Q3 L
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fungus from the soil to your

plants.tvb now,tvbnow,bttvb; l9 j) e, ^- t2 Z9 b6 B
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Stake or cage plants to keep them

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 2 W, k: O7 Y4 t# ?

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of 5.39.217.76, l4 U) e; C( V6 C7 M4 ~
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space above the soil without any leaves. Do not use 公仔箱論壇) X/ w# e\" \3 F* r3 z' U0 F2 C

overhead watering. % ^1 e4 @) V' [/ B  q  j3 t( p; I
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,bttvb0 h/ \4 P+ \+ a8 u" A& [
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 tvb now,tvbnow,bttvb% |5 L) |0 [# T' o4 F1 q2 s
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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
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wet. Keep your plants happy and healthy. Weak and stressed 公仔箱論壇3 u  N6 O/ Z* t

plants are more susceptible to disease.5.39.217.764 K- w/ b: h( J! `% |" s

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。3 r  a; E# W2 t
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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. v; o0 K* E& }
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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.
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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。& q+ G- p( M, z\" T* f0 h
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.
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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 公仔箱論壇* E) T+ {, n0 p  ]4 t" K6 D$ g
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plants in a garden. Once a tomato plant " H' G% o6 v( b) Z/ W2 n4 X
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 5.39.217.76! }2 p1 Q5 E4 U3 R0 c, K% J
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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 \) h0 M0 f$ \0 U) a; O+ p/ Q4 v

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 8 r3 @7 ^% T8 m
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Septoria leaf spot infections will also help prevent late blight infections.

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