[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
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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 # j1 p" w! F2 U
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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 5 H- @' w7 _8 T2 l$ R1 ~( m
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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。; X9 A* F3 P# N+ |% c2 W  ~% U
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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

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.公仔箱論壇/ i  n8 D' w; s
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How to identify 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。7 g% E6 b- A8 j+ u- g% g

Symptoms of Septoria leaf spot also start 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 e, x7 }; D' e$ V
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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 公仔箱論壇4 r0 d6 I* r/ X, N5 I- h
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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. 5.39.217.77: {$ Y8 ~' _$ _8 s
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Small dark spots, the fruiting bodies of the fungus\" J3 O; a' g/ O: u
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, 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
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Septoria Leaf Spot公仔箱論壇+ K+ e) s9 p% u$ c: t$ ?
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Follow the 12 easy steps below to enjoy a

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.tvb now,tvbnow,bttvb' Z) h4 w3 O( O2 ^, f: q8 y/ d

Weed your garden. Some weeds,

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants." G8 u* x( h7 Q/ Z! G1 X9 [
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Rotate crop locations. Don’t # p3 b' s3 x! ~+ M
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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,bttvb# \/ S. d4 z, L4 H/ R$ n$ P, i

where tomatoes were grown.% b& ^1 R$ S. z( p
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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。( m/ I9 X& I# z7 ?3 Q) n, h
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of

fungus from the soil to your tvb now,tvbnow,bttvb9 @8 ^5 ^* i6 O3 y

plants.5.39.217.775 i) E% k0 u- P

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
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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 tvb now,tvbnow,bttvb- Y3 j" I, S( ?$ t4 l- r5 e
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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 2 A8 p* o& @4 W& C0 D7 K0 T

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
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early tvb now,tvbnow,bttvb5 ^% g, m& T9 o5 F

enough. If a plant is heavily infectedtvb now,tvbnow,bttvb2 T9 Z/ A3 G# j/ B- i- F8 ~
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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

to remove diseased leaves should be disinfected before being used on a different plant.

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 7 F6 B$ A6 B) w

GreenCure.公仔箱論壇3 y& s. w% ^/ O% o
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Late Blight on Tomato Plants5.39.217.77( v3 L% H/ ]4 c  c! \/ Z
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 7 v0 ~+ ?% D; b
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plants in a garden. Once a tomato plant " f- y% T$ o% ^* S- W3 @2 ]& M$ l6 k5 Q
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 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' x: s" R$ H2 M0 J3 Y& t3 \/ N% p& O
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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 blight0 C# M2 T6 o. o

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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