[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 ( T# D' Y* j$ j$ v0 E6 R
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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.tvb now,tvbnow,bttvb% }% X, v+ q9 a5 \/ Z
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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 5.39.217.763 x4 `$ }+ R  C) s/ ?6 K8 V
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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
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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。/ [+ U' H9 V+ A1 d
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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。+ X: C  K# |# D' L7 ?5 q7 T% E$ [0 f

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。0 y- @  {" D7 q& J- `
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How to identify Septoria Leaf Spot
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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. 公仔箱論壇" _: O) S( B6 G

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 ) `' b  @9 ]. M( p

and dead. Stems can also become infected but 0 x; k5 e+ K, c

infection of fruit is rare.
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How to Prevent and Control Early Blight and

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。% m# ~" ^0 G8 e% |  p( Q2 f, p

Follow the 12 easy steps below to enjoy a

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。3 u1 M0 \( j4 j( c1 E9 p
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.( m: E/ p$ f# c: J- o' f+ n
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Rotate crop locations. Don’t 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。: Y7 N7 S. V& k
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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,bttvb8 i/ T9 E) j. T

where tomatoes were grown.
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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 q( e3 O1 d* w5 N( a
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fungus from the soil to your
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plants.公仔箱論壇- o3 I2 U9 j: P* [+ |3 q! J! V

Stake or cage plants to keep them . m3 D* S% T/ @- s$ y% r4 V

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$ n* U! ~& G: m! j# z0 X/ |
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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

space above the soil without any leaves. Do not use

overhead watering. ! @& V2 B9 X# @8 F7 r
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 公仔箱論壇4 C" n% ^5 O& x+ ~2 N6 A
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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 tvb now,tvbnow,bttvb* v2 F" p5 t$ b
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wet. Keep your plants happy and healthy. Weak and stressed 9 R3 o  E, Q! d5 o9 v
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plants are more susceptible to disease.tvb now,tvbnow,bttvb% _; s( ?8 W- {- |% {: A: Q5 f) Q
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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。' P+ T1 q) ^1 P- _\" `  R
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early ) l  D  f- o1 k; ~: |$ A- o
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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 5.39.217.767 B9 \: g$ X/ x' r* x/ M

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

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 5.39.217.76- a6 g( E& z# K+ w' u$ @* b$ b8 X4 e

GreenCure., w; {3 C6 S4 c, X7 Y

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Late Blight on Tomato Plants% y& z( Q- }( V$ L+ Y9 B

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato

plants in a garden. Once a tomato plant 5.39.217.76% q& A3 y1 O* `4 f% d* Z7 a' ^
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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 blight公仔箱論壇. P' y$ }2 ~- \9 O\" S3 v& Q

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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