[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.tvb now,tvbnow,bttvb" a. _1 m: Z9 D
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How to identify Early BlightTVBNOW 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 ]9 h  x/ O# L& h

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to ; |5 s; P  q" H- q& O
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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 公仔箱論壇" z# R# p3 D. ?- Z' z5 i

in color and form concentric rings, or a

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 - i( z" m/ U% \. i9 B3 ?2 u

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb/ x- s) Q& h0 b7 q% j  P2 E

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How to identify Septoria Leaf Spot- [; h8 n# |- T0 H7 `% m
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Symptoms of Septoria leaf spot also start
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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 tvb now,tvbnow,bttvb0 T! _4 M; I, J( d. V. d/ i# n+ u
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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.

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
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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 5.39.217.77/ R! o: b. k\" r5 L\" Q
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Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a 公仔箱論壇* D1 ~6 u: {, l: C9 M

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5.39.217.77' x7 u$ O1 v3 q* i# B

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.* C% }2 m, [1 V" u8 z( t

Rotate crop locations. Don’t 5.39.217.772 R, [( f4 T1 D% T8 I5 T& V

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. j) y( \  n7 z! H( \# v

where tomatoes were grown.公仔箱論壇0 A3 u$ Q4 j7 D* e+ c) d
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.9 R: j- a; Q' X4 j: H
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of tvb now,tvbnow,bttvb! X- V3 k+ e: Z8 _9 n" d1 \$ }

fungus from the soil to your tvb now,tvbnow,bttvb8 G, I  ?6 C. b) @

plants./ E2 C3 s6 ]# a' F9 n1 z
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Stake or cage plants to keep them 公仔箱論壇  M% {% n2 V2 |+ C  Y

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 公仔箱論壇' R0 B  X/ ?; {; e: c
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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
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overhead watering. / K0 ]7 a% x0 ^9 R$ b" Z5 W$ ^
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. % k( E0 r: w2 h1 t# j7 q( ?  E# Q# W
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。" J) G: |0 ?. n7 n' {9 _8 W( u; f
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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 * ], l7 ?1 j5 ~& f* p: m  b/ v
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wet. Keep your plants happy and healthy. Weak and stressed 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。* W  C5 Y, E% m2 m
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plants are more susceptible to disease.4 ~7 f' o! z/ W4 `. S0 {* D

Remove and destroy or throw away diseased leaves, both off the - s3 k1 F' r$ ~
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early

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
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to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb5 m7 V, G! L3 j9 W$ N0 F

Spray plants to prevent and control the

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try / |/ B7 r$ s! I( M

GreenCure.2 h3 A' g3 f* }. R5 K3 Y

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Late Blight on Tomato Plants; A- x9 {! N* l" p/ z
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 2 d  p& \2 W1 t: ?5 K" ~1 B0 R1 W
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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公仔箱論壇- e' d: N# D' G5 ~$ _$ O% X) J- |( U
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and tvb now,tvbnow,bttvb  I4 G% {3 ?% Z" W' O

Septoria leaf spot infections will also help prevent late blight infections.

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