[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.5.39.217.778 h3 T& H- z8 J9 ^( G+ n
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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 tvb now,tvbnow,bttvb' L. P& [$ X  @  A
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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 tvb now,tvbnow,bttvb& f* u' n( c8 R3 k$ Q: b6 M+ m

in color and form concentric rings, or a tvb now,tvbnow,bttvb8 e' y4 b% E1 l+ P
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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 tvb now,tvbnow,bttvb) h9 G0 h9 Y- n0 H9 T% {
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.
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How to identify Septoria Leaf Spottvb now,tvbnow,bttvb+ L1 b0 V% I) K* y+ }( `0 O9 ?7 j

Symptoms of Septoria leaf spot also start tvb now,tvbnow,bttvb) A; C- J  }$ F) Z. v8 H- B" F5 a7 Z
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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
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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.
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Small dark spots, the fruiting bodies of the fungus: C2 s& @! h7 c( ]  [2 q\" R, D! r7 t

, 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.5.39.217.779 M0 z' O9 \# ~7 L2 N1 P. f
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How to Prevent and Control Early Blight and & ?* W1 i( h0 U$ U
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Septoria Leaf Spottvb now,tvbnow,bttvb% @' C, W. q" R0 E+ _: l# ~5 g
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Follow the 12 easy steps below to enjoy a 5.39.217.771 J6 g9 h4 b' o5 g\" R* J8 s/ C& W
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds, 公仔箱論壇4 B$ E0 m& Z' u
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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 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' z  P8 k# x0 N
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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

where tomatoes were grown.公仔箱論壇  `6 f6 u; ?7 ]7 X
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.tvb now,tvbnow,bttvb( D# ^/ R: w9 Q# z
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of : I; {. p; c% p
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fungus from the soil to your

plants.tvb now,tvbnow,bttvb% m8 Q6 T7 `3 N- \! j; {3 z
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Stake or cage plants to keep them

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 5.39.217.77( g: h3 h# Y, @  h9 R
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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 5.39.217.775 f, G/ v' I7 H5 x

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. 5.39.217.779 d; z9 E6 z5 w3 Z/ W1 C; d% ~9 Y: t
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。: r) y' H$ W% q+ b: I" @4 I' X
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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 : B" T" d# ?# L
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wet. Keep your plants happy and healthy. Weak and stressed 7 R0 L; n5 T; S( {+ D

plants are more susceptible to disease.% j2 Q5 ?! D& n5 O# w. f( s: c

Remove and destroy or throw away diseased leaves, both off the 5.39.217.77. ~* _# ?0 f) ]6 U( k% k0 p, d6 u( u

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
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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
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to remove diseased leaves should be disinfected before being used on a different plant.6 K$ X" s% @- u, T) ~# {4 T2 [
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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
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GreenCure.
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Late Blight on Tomato Plants

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

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,
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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 blight

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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