[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.) P0 K& F. t1 a4 @* `

How to identify Early Blight8 _1 a7 |' N: n* ~8 i

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 2 P. R! S3 b9 B0 |; F9 J

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown www3.tvboxnow.com! j8 N0 |: [' p5 S- o( c
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in color and form concentric rings, or a 公仔箱論壇; S. _5 ^+ C9 A- Y; u3 B
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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 8 p( A: }1 ]2 W; G

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.

How to identify Septoria Leaf Spotwww3.tvboxnow.com$ D3 l* O5 d0 C2 m$ h" J5 S6 T
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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 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。6 r. Y4 V* y7 D' I+ {

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公仔箱論壇1 n0 Z) W) x/ Y+ k) f% G\" R& X- k
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry ; X/ f7 l$ I, P/ V: ^/ K  W
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and dead. Stems can also become infected but 0 ~! V9 }' I- X: p

infection of fruit is rare.
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How to Prevent and Control Early Blight and \" E1 u3 a& n0 d! n

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.

Weed your garden. Some weeds, 8 [+ s- @( m# u# I
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.  \! z0 I1 ~& Q4 [" m

Rotate crop locations. Don’t

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.
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.+ Y- v& d! V$ U  B& O2 C4 g
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of tvb now,tvbnow,bttvb4 O/ u/ A/ d* [: m. [: O/ h
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fungus from the soil to your tvb now,tvbnow,bttvb* b! U8 y/ c% q) ]3 y) N

plants.公仔箱論壇$ U- Y! J# g: \- V
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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 tvb now,tvbnow,bttvb! Y. C7 E- e- z3 I1 }
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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 tvb now,tvbnow,bttvb1 o1 X. ~6 A& M* X

space above the soil without any leaves. Do not use

overhead watering. 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。% A5 h' t' b* A2 h- I7 |8 F6 ]
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
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wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the tvb now,tvbnow,bttvb4 ?  `- B9 s' G: J6 ]9 g9 ]
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early
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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 www3.tvboxnow.com- d# Z' U3 |* ~5 l4 O
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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
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GreenCure.www3.tvboxnow.com* n! F/ Z. A9 u" R# i) Q8 T
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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
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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, tvb now,tvbnow,bttvb1 \4 W4 e2 |3 V0 |9 G
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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
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 公仔箱論壇6 o9 M) d/ o5 p' c

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

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