[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) p  L' u5 j2 C2 i0 e) }
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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
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow,
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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。2 |9 U+ t; i5 v4 ^( D, M, r$ ^
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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。6 Y# C7 N7 M- H9 y' K$ S

How to identify Septoria Leaf Spot

Symptoms of Septoria leaf spot also start / p/ J, o* h" i7 W+ E$ H

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change
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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. 4 Y6 H1 g, M  I, P8 j2 P

Small dark spots, the fruiting bodies of the fungus公仔箱論壇1 J% {* f! o1 E) `9 k

, 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。! g# p9 H, a1 e0 b0 g
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and dead. Stems can also become infected but 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。' X9 d: @3 @/ Z8 J6 a( ^

infection of fruit is rare.
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How to Prevent and Control Early Blight and 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。# ~. |; \8 J. \& ~% o. e; H# U
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Septoria Leaf Spot9 |9 p5 N9 i. ~

Follow the 12 easy steps below to enjoy 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。/ t+ L; h: x, j1 q: d6 U) I+ ~9 L+ r

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。; v4 L9 e8 z2 i9 [5 @+ Y4 X

Weed your garden. Some weeds, ! O# Y" O/ X8 ~+ A1 g' X% `
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.9 v" K7 j" w8 a+ a. f
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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.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。; s! z( {1 e0 n- ~- ~  |& l, |
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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 公仔箱論壇  h1 k  h* o# `! [# r* F
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fungus from the soil to your

plants.5.39.217.760 p: D8 E# h& X2 ], J7 a* D9 O

Stake or cage plants to keep them tvb now,tvbnow,bttvb. `& f9 F" W+ y. n5 _7 J& U/ l, s

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* ^5 F* G. `$ @3 u. ^! m# h8 _

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of
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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.
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 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。' y# `5 |* l8 J! I/ \3 b

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
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plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the
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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
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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 5.39.217.76* X) X# \8 Q1 V: h/ V
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to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb$ Q; N$ m1 Q5 k7 _

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。4 ~; Y# j. |) \1 H' ^6 m( \
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GreenCure.
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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

plants in a garden. Once a tomato plant & j, l! B  ~$ ?; K. E) y& K/ M( V

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 5.39.217.76# h  i% ^# d$ J, `2 b

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,bttvb& u; W4 R) ~$ M* \
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 5.39.217.76( k2 Q$ L3 A2 F+ O
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Septoria leaf spot infections will also help prevent late blight infections.

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