[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 5 B6 _2 c+ |5 r6 }

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 Blight5.39.217.77) T" u* I# t( m  \

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
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 5.39.217.77/ Z1 _4 g2 ?  h3 b; Y5 ~; S; Y1 ?

leaves may fall off. Extensive loss 公仔箱論壇& u- k7 s5 t+ W( c6 `

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 Spot
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Symptoms of Septoria leaf spot also start ( t. F6 L) Q- O9 M4 ?8 S
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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

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

, 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
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Septoria Leaf Spot
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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.5.39.217.773 }. n* y! z/ }( q3 e  F- z- g
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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.
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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
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where tomatoes were grown.

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.3 v, x# ~/ {3 W5 K" T
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of & C/ V& p: g! p! \3 q" |

fungus from the soil to your

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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 # M# k- x# f3 U3 K8 ^
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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. tvb now,tvbnow,bttvb3 Z3 ]2 d$ r: Z4 i- y+ s
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 5.39.217.775 h( |2 i# W: ^+ F! P
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( y6 t  o4 b: K) y, L' j. f

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

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early / S. u3 P' r- ^( `' V$ h

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 % U" }+ r' F6 W# P! V% B7 p+ F5 O9 A
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to remove diseased leaves should be disinfected before being used on a different plant.# P5 J  k# v, t
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Spray plants to prevent and control the 3 s& I4 c+ H$ c6 i) O5 C
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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。) p0 M5 F9 `/ a% x5 r  r  [- U- R
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GreenCure.

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Late Blight on Tomato Plantstvb now,tvbnow,bttvb. I" R" H5 x2 J( g; l3 B
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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

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 5.39.217.77) a1 P. o" T. ^# z
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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 blight5.39.217.779 B, @, V  I/ z5 M+ d
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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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