[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 % G8 N  P; r3 L

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
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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

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 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。- W3 W7 J$ i2 p

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 Spot6 x1 r/ T; c1 z: R7 E

Symptoms of Septoria leaf spot also start 0 Z; S3 S7 S, ?

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change , W) c8 H1 j! n: _* N

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. % C! W4 [& D& H9 |; P
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Small dark spots, the fruiting bodies of the fungus公仔箱論壇6 o\" _0 r  ~  O8 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 0 z' a8 M' P8 p( w
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and dead. Stems can also become infected but www2.tvboxnow.com- V% \, I% N. u

infection of fruit is rare.8 t+ ~* K( }, T% i) I/ b8 O5 s$ ^+ G
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How to Prevent and Control Early Blight and 9 c. a6 N) L2 A9 A. B

Septoria Leaf Spot! s# m" ^- l' |" }7 c1 \* r3 c: e

Follow the 12 easy steps below to enjoy 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。! g* m4 ]. g) _; V; r' J
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.tvb now,tvbnow,bttvb8 N8 P3 M! G/ p" k5 R/ f$ X5 t

Weed your garden. Some weeds, 4 ]) G, F$ E! K7 S4 o5 a
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.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。( Y0 w! I1 a. W  `
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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 $ s1 {! {2 d! [2 I" K9 N. T
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where tomatoes were grown.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。& x# ~- R' q0 g& D1 i! H. k

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.5 ?0 c3 h% _8 j$ Y' {! q6 |. O
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
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plants.
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Stake or cage plants to keep them 公仔箱論壇7 O! E/ B1 G% a* L3 X; ]3 Z9 ^
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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 公仔箱論壇4 L  c5 P$ G6 b* F: I6 A

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

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. www2.tvboxnow.com/ t) f% ]9 ^& r
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 3 C# w: ~/ k2 L  k6 x! z

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

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 - H& H% t3 y6 a' B2 E! l" I

enough. If a plant is heavily infected  \+ N7 g\" q) x- y* h) U8 I5 g0 z. s

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used * S; a, @7 B+ w1 \6 y: f
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to remove diseased leaves should be disinfected before being used on a different plant.4 n  \$ {3 @- C, F9 `: D

Spray plants to prevent and control the

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try % d1 A5 v8 L* t& H: T
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Late Blight on Tomato Plantstvb now,tvbnow,bttvb0 Q! W1 O0 d6 |+ J" P0 e3 W
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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
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, www2.tvboxnow.com0 [5 d3 b. R% [" B7 ], f

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7 F6 X6 g) Y7 V

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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