[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.
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How to identify Early Blight. S4 A: k* T. d8 M

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 公仔箱論壇4 U2 Z7 `; E) J' B+ z
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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, 公仔箱論壇2 P" Y, d( A1 {# y

leaves may fall off. Extensive loss

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb3 y, K3 T8 v: t* ^

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How to identify Septoria Leaf Spot

Symptoms of Septoria leaf spot also start 公仔箱論壇" B$ p4 i$ c* K0 Y' Y: d
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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 1 R# w* U% b/ Q% v! I
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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. : V7 W  W7 ]- Q# }

Small dark spots, the fruiting bodies of the fungus

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
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and dead. Stems can also become infected but 公仔箱論壇\" J4 H7 }$ Z\" b$ C6 O, L
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infection of fruit is rare.( j  a* E$ `! y3 _) H4 `: K, @, t
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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。1 x% D7 S+ x! x* H8 B+ q

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, 5.39.217.77:8898& s2 M3 [# Z5 K$ p: l

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 公仔箱論壇# w! m4 N/ D: h2 w
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where tomatoes were grown.tvb now,tvbnow,bttvb  \2 a4 ?" A9 w
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.tvb now,tvbnow,bttvb; D- r; r. e. t+ u, P% c$ |
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of
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fungus from the soil to your 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。$ b" X- n& r, _9 a

plants.
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Stake or cage plants to keep them

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& C7 G5 K% _2 f; G
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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

space above the soil without any leaves. Do not use 公仔箱論壇7 ]# y5 ?/ F: {2 K  P\" X
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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. 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。- s3 r' `/ S" v7 O
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 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。, Y: Y# ~5 f+ N- b- p' }) A

wet. Keep your plants happy and healthy. Weak and stressed \" K6 L: s, z1 Y9 m
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plants are more susceptible to disease.tvb now,tvbnow,bttvb2 L7 H$ g9 M& M9 O
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Remove and destroy or throw away diseased leaves, both off the 5.39.217.77:88983 y0 b  J0 A\" N\" ?: g# T

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公仔箱論壇! W/ K/ a1 q, f( ~! q
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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
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to remove diseased leaves should be disinfected before being used on a different plant.公仔箱論壇5 M' D) z+ O" ~! M- [, ]& X

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

plants in a garden. Once a tomato plant 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。# }& O2 X. l3 i: z
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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# w7 O4 Y) r6 x) {" `$ a" n6 K8 [
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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; Q. U1 J\" S  H

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and tvb now,tvbnow,bttvb% A4 I+ I# W: Y# w8 \1 j4 {
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Septoria leaf spot infections will also help prevent late blight infections.

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