[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

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 公仔箱論壇( f; Q0 B/ o0 s7 \( i

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 \" }5 H2 E6 B& c
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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
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb6 F. c' L/ L3 ~/ H5 a/ T

How to identify Septoria Leaf Spot

Symptoms of Septoria leaf spot also start 5 C) b, V0 {" R! k
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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. tvb now,tvbnow,bttvb# Z! r  j/ J; m
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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
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and dead. Stems can also become infected but

infection of fruit is rare.
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How to Prevent and Control Early Blight and tvb now,tvbnow,bttvb2 Z* [8 t9 Y% v( Q* C

Septoria Leaf Spotos.tvboxnow.com2 W3 A. U- S0 m  s+ _; t+ q3 i0 }5 Y

Follow the 12 easy steps below to enjoy a , f! L& G# d2 q, k5 ^% D9 Y

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.

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.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: u6 p7 O+ @/ X' o

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.tvb now,tvbnow,bttvb( x9 {  X$ `3 u6 N, i3 B3 i; {0 [
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇, L6 ^4 j1 i* J4 u2 @
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of * Y* ^3 B9 A" i8 _/ g$ d( e

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
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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 0 s5 q  Z1 h* P' Z0 G' O1 K$ k
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space above the soil without any leaves. Do not use
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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. / X3 `9 j% z& a1 @  i( @- E2 O
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   Y. l6 Z; L, s( {* x4 s, Q. q0 a. x
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wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.公仔箱論壇5 b* n' [) q  w. ^6 X

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。6 O3 z0 ^8 q& X# c* S1 t# J
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 3 z5 h& F+ ?$ n. i0 V
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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 公仔箱論壇# T' [- X7 C7 {; l, k; J7 b
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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
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 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 A: d1 g9 O. u  u. f9 I
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GreenCure.

Late Blight on Tomato Plants
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato
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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% X; s" b9 q9 V, u7 h7 _

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,bttvb3 r& k# @; u. Y! U2 |+ |, G- S

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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