[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 ' a5 O) {- W0 e

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.- t8 U$ C2 E: _8 `* q- C, z

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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 tvb now,tvbnow,bttvb) i5 A9 a2 I& P7 E) m
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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, 公仔箱論壇3 e: }" ]- K3 o6 b( }4 [

leaves may fall off. Extensive loss

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.5.39.217.77:8898" d: O3 `2 \! H1 F

How to identify Septoria Leaf Spot# @# L, m0 z7 S7 A
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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 公仔箱論壇; z% p- L' e( K! z3 T
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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. 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。$ i" W8 j7 w0 t) Q
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Small dark spots, the fruiting bodies of the fungus7 i8 Y, |) H7 B' U* h4 K

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 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。# K! g. W0 X- s, e0 M

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 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。1 }+ k( _; N% F1 n
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。. P. t9 R3 p. F- A. A- ]
Follow the 12 easy steps below to enjoy a 5.39.217.77:8898' S) Z! f' y, p$ w' G
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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, 5.39.217.77:8898" M7 z; P- u  Z- c' H
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 n0 f) i) c" D) R9 H+ `$ \
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 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。( T5 o2 ~1 r9 [" B, p5 _9 z6 p/ G6 o
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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.; V4 z8 {6 B  _8 r" m: S
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of
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。7 D5 S- b, B  h/ n9 S
fungus from the soil to your
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plants.

Stake or cage plants to keep them 1 Z+ w7 s/ X; {# D
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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 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。" a! G% P$ ?  n2 I. a) c( \

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 : d) i! F  C/ R9 P3 U$ d9 W

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 公仔箱論壇2 ]3 e# Y( E' N& H8 b6 d+ ?6 l; ^

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are 5.39.217.77:8898+ O) |6 O, L' }# P( @7 a9 d; Z

wet. Keep your plants happy and healthy. Weak and stressed % q6 r1 y, f$ j# @, l

plants are more susceptible to disease.tvb now,tvbnow,bttvb1 U+ K* l) o+ n- B' Q
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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

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

to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb& y; t4 W8 l, ]; K( u0 V1 G6 ~

Spray plants to prevent and control the

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。7 r. ~( f! G2 z1 t  j% M

GreenCure.# z& ]# ]: h+ y" m0 o. Z5 A" P$ t

Late Blight on Tomato Plants公仔箱論壇# }9 u: Z. G' }7 L# Y1 E9 W: 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 tvb now,tvbnow,bttvb. ~+ }; r! K6 G# Y

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, ; I5 K9 Q0 R+ x/ q% N8 J9 q9 S

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 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。  T7 [9 P( q6 Z7 b6 m
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Septoria leaf spot infections will also help prevent late blight infections.

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