[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/ j- y8 T* Y. Y. d* `
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How to identify Early Blight
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Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to

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 公仔箱論壇! {7 A' v# J. K. W4 f

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb3 |! s- n: {# s% g! i
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leaves may fall off. Extensive loss 公仔箱論壇/ ?+ Y6 ?& }; k; H# Y/ U  _

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.公仔箱論壇# R2 {' k' K( P5 V2 G' u4 \; E, C9 d
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How to identify Septoria Leaf Spot

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. os.tvboxnow.com- w9 n- ^" j9 Z  F( v- _. c# ~' h  G

Small dark spots, the fruiting bodies of the fungus
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, 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。: t% F4 b# p5 u6 B

and dead. Stems can also become infected but
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infection of fruit is rare.

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How to Prevent and Control Early Blight and 公仔箱論壇' L/ N4 s: |2 z

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。$ B! Q, E* d# t
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Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb  g2 D0 f8 G! f3 y

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。; z; @7 L! J. F! }
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Weed your garden. Some weeds, ; O1 H) n& K6 \; \2 A  ]

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.
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Rotate crop locations. Don’t
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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 / \" ]# L) |0 n. S- y
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where tomatoes were grown.os.tvboxnow.com- o9 q0 o4 m! e$ e+ x2 E
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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。. F& w. Y. K: }  y& ]- K& o
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 ; X8 h* f- x0 Z* K; M6 C5 M% k
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plants.

Stake or cage plants to keep them 8 F; a. |# K/ x; ^8 A& O

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& C2 T& h  v$ T- B$ C+ n% [0 ~
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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
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space above the soil without any leaves. Do not use

overhead watering. % Q% ]/ `. q7 K* _0 \
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
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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 公仔箱論壇' h; M- H7 q, i3 w

wet. Keep your plants happy and healthy. Weak and stressed 公仔箱論壇8 Y5 Y1 l# {$ [; `: u$ h$ m
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plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the 公仔箱論壇  Z/ E: }. a1 {& ]. w\" ?
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 公仔箱論壇) T3 _, W$ T: n5 B2 u* F' n
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enough. If a plant is heavily infected公仔箱論壇% d7 u4 r) l; i6 g( h2 U

, 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.tvb now,tvbnow,bttvb3 T; S9 G% x' l5 |+ @& S* h, H
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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。, M- j* F/ U& G$ t' i& i

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try : v" q( v9 }/ {2 s3 E

GreenCure.

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Late Blight on Tomato Plantstvb now,tvbnow,bttvb1 S. F1 H  D8 C) Q: p3 @! P" M& |
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 公仔箱論壇' W: G3 _  w; V& h7 o

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, 0 C' R- x7 D3 ?

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
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing 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。' O+ K. t# M" h" M" t
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Septoria leaf spot infections will also help prevent late blight infections.

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