[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.4 u6 Z( R0 m; a

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。5 E7 ~8 a7 ?1 T% V9 A* W( y) h
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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 5.39.217.77:8898( g1 x2 f) K! k  x) s( e& j
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 i* r  S1 c3 H* K, D5 a
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 tvb now,tvbnow,bttvb8 O9 Z$ G9 u( V
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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 0 C% Z' Q) r: s- H5 u) J# W# j

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.5.39.217.77:88981 m6 E8 o& e5 W  a  U
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How to identify Septoria Leaf Spottvb now,tvbnow,bttvb( M& d6 b* s- |+ a# a- n

Symptoms of Septoria leaf spot also start 公仔箱論壇5 \: F2 U0 |2 ~: i- J0 p
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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. 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。! z; s. j" J! L$ D' B" R

Small dark spots, the fruiting bodies of the fungustvb now,tvbnow,bttvb. @2 d+ B. s- I
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry

and dead. Stems can also become infected but + a+ ]/ j0 d; X6 t- Y. x. v

infection of fruit is rare.
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How to Prevent and Control Early Blight and

Septoria Leaf Spot

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,
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.5.39.217.77:8898: o' A. r$ g, B% 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 4 s' H( Z" Y3 i. U
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where tomatoes were grown.5.39.217.77:8898: P$ H* s& `1 U% }3 Y- V! o# I
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.5.39.217.77:8898( u% P1 C: U$ @5 r! v3 Q; K
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.

Stake or cage plants to keep them % N- ?# p6 y: x% V' @3 M
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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 5.39.217.77:8898% @& [; Z& K2 z1 l: _  u3 W
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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
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space above the soil without any leaves. Do not use 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。( M/ J# e2 R. S8 q- \2 E

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.
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。  I6 p6 |+ n( [" G6 G/ B) x

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4 n" R' X3 m" z* t4 r6 X8 q) a! E

wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.- O# a( ]; w& x" A
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Remove and destroy or throw away diseased leaves, both off the 公仔箱論壇9 B\" s' [' }4 _! U

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 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。. A3 R1 r9 X. H! t
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enough. If a plant is heavily infectedtvb now,tvbnow,bttvb; k6 u9 b# z; F

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 5.39.217.77:8898& S0 R3 C0 B9 K0 J. h* [0 a) J# a

to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb; F* X' j* M- Z( ~8 D( n9 ?
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Spray plants to prevent and control the 7 y9 N/ _: a* B+ j5 J1 Q7 x: e* i
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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。; W4 ]  W- Y6 \& b2 {
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GreenCure.
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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。) _2 M8 A. _$ \8 t. O5 D0 r' @1 h& p
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
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, tvb now,tvbnow,bttvb; J; c+ I% ^$ }) U' |* 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

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 B0 [- i+ S0 ?  i9 I& u6 }
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Septoria leaf spot infections will also help prevent late blight infections.

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