[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.公仔箱論壇% H0 s7 A6 N, ?9 t) }1 g, m- D/ l
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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! c( o1 k" p+ 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
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in color and form concentric rings, or a 1 ^8 r/ w; M6 T. A! C( H
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 公仔箱論壇- x3 k8 T+ K2 E9 T

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。1 H3 [2 b+ l# f/ P! ~% U5 R8 i1 B
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.

How to identify Septoria Leaf Spot5.39.217.769 q) |# u% Z, z- t4 R' U1 h
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Symptoms of Septoria leaf spot also start 公仔箱論壇. Y7 ]5 b) r5 R' M2 ~

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change 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。' n; Y. Y# U% h% H) Z8 t0 ?
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shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 5.39.217.76- p" T' y9 J0 ]; T

Small dark spots, the fruiting bodies of the fungus5.39.217.76. y9 j5 c- X0 J$ K0 o\" l  p

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 5.39.217.76" z+ b' |& u+ r' s

and dead. Stems can also become infected but
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infection of fruit is rare.公仔箱論壇* i& U& e# R+ ]9 o  x7 F
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How to Prevent and Control Early Blight and
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Septoria Leaf Spot

Follow the 12 easy steps below to enjoy a * d8 Y- A; ~) Q6 k( }

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5.39.217.76; E1 _% X3 u) F0 M
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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.

Rotate crop locations. Don’t - U' O3 |9 {( T5 T$ l

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 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。& K+ d6 [( Y, Z7 a

where tomatoes were grown.! ^* H, o" l" v& p" ~: p7 g+ m
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.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 I. @" n# N5 h0 w  j( k
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of
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fungus from the soil to your 5.39.217.76/ a: [% p( v2 E- Y4 c
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plants.5.39.217.762 x# t& T" c* t/ h3 N; |3 n+ u' m
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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。% O8 |& _5 _4 j  {  Y
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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

space above the soil without any leaves. Do not use

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. 5.39.217.76& C! g- s0 B% q1 F' z
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,bttvb1 s* O. O- P& P5 Q# a4 O5 g2 n
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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,bttvb0 y& ]7 C# m% D# A. l' e0 v
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wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.
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Remove and destroy or throw away diseased leaves, both off the tvb now,tvbnow,bttvb) g; B( C) S& J

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 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。9 E3 q% v- W- d  D5 B) b: ]( l

enough. If a plant is heavily infected
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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 公仔箱論壇" O! c% j8 ]9 u. P8 g+ [5 o" ^7 J7 a3 O
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to remove diseased leaves should be disinfected before being used on a different plant.7 a2 u0 k, M" f8 I# S2 Y
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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 & Q# T7 C  g3 e& s: J- Z- p
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GreenCure.

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Late Blight on Tomato Plants5.39.217.765 Z+ F+ a: c) p8 D( |

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
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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' G\" a) G! x8 y

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 公仔箱論壇6 x  d; x. v" y5 B$ ^2 H
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Septoria leaf spot infections will also help prevent late blight infections.

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