[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.tvb now,tvbnow,bttvb7 b- o7 N: S* n" l  A
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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 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。' r5 ]4 t/ S' X& h7 }/ k& q$ \
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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, www1.tvboxnow.com7 B" ?+ @$ D  U, K4 `; i
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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。0 }/ `" `/ @+ \% g# u/ X: ^8 B2 _

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb; y$ w; v; i1 C- s; R( s/ d+ w$ A
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How to identify Septoria Leaf Spot

Symptoms of Septoria leaf spot also start
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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 tvb now,tvbnow,bttvb5 P8 a- x5 l, G8 Z
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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.

Small dark spots, the fruiting bodies of the fungus) R' a9 Y: G/ n\" I+ z# ?
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry www1.tvboxnow.com$ n- U1 v& C8 t! C+ s1 |

and dead. Stems can also become infected but

infection of fruit is rare.7 @& W* L% @5 F" x2 ?! E) d
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How to Prevent and Control Early Blight and

Septoria Leaf SpotTVBNOW 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。8 U% B5 j8 O, ~* ?( [
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Follow the 12 easy steps below to enjoy a
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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, tvb now,tvbnow,bttvb2 z1 e6 P! B# G0 J* v8 D5 h" u

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.% y. K3 ]% I* b7 a

Rotate crop locations. Don’t , E$ I# U# w# o- |. S1 y& W
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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 公仔箱論壇) S& R& Y8 W  c  A

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。3 r0 F  Y5 V; R6 \! p( J& B
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇2 v2 x+ `, Q6 r3 M
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of $ C' ?/ y( K- O. D
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fungus from the soil to your
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plants.

Stake or cage plants to keep them 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。& L  o/ H0 b. V  U4 G; Y

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and ! B# c6 R9 P' d( }
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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 公仔箱論壇7 _. f# r( |# Q) M: m" b  \

space above the soil without any leaves. Do not use tvb now,tvbnow,bttvb: d+ r) ^( h7 y1 f
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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 : X- Y$ }: Y/ l! I; P$ g$ Y

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! M5 u! L0 u' A

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 www1.tvboxnow.com$ i  Y( H* }7 P& c5 k
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 8 [2 I+ h- N1 ^. V& Y, u' G! e, }
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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 $ w& a4 |) x4 }6 A5 v# o& s4 P* f

to remove diseased leaves should be disinfected before being used on a different plant.
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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

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
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plants in a garden. Once a tomato plant 公仔箱論壇+ @' X& }" T' B' C' m7 U
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,

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 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。8 G, K# C1 `% F7 S% e
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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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