[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.5.39.217.76: l4 o6 x1 K1 W" {" P

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 % v2 i) p; F1 w. G; R  A, a" S5 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
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, : P0 ]2 ^7 t4 ^; {) S5 x# L4 D; 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.

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How to identify 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。; P8 _- d7 R* K- F1 l) ^

Symptoms of Septoria leaf spot also start 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( y2 \( O/ w9 Y
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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
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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.
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Small dark spots, the fruiting bodies of the fungus& t' f$ n\" H# r
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。% ]5 F* F% E2 W6 `$ U
, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry " S% h, ~; ^) F7 _
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and dead. Stems can also become infected but

infection of fruit is rare.. A2 n+ J+ _9 X6 V1 P

How to Prevent and Control Early Blight and 2 ~, _% q) z. B
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Septoria Leaf Spot公仔箱論壇+ G0 f9 B: z+ f( {. e0 s% ]
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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, ( X, P% b/ H2 o$ F% A0 i3 M( t
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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 5.39.217.763 w3 ^7 e' g' U, P

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 5.39.217.76! V( u7 S7 D) o- z

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。# a: q8 c" o: P  N0 R

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of ' ~, g# R. S" @' M5 \9 d

fungus from the soil to your
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plants.

Stake or cage plants to keep them 公仔箱論壇+ z! |" r$ E& s5 {
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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 6 |* K7 \, ?/ U4 q. m/ 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
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space above the soil without any leaves. Do not use 公仔箱論壇; ?\" F' ^2 \: u- R, C* 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. 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) g) G2 \0 o+ u+ v
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 1 {0 t' J. \; A% B
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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 7 t3 ~' f5 D- E

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 1 y# F" w; I8 B- L$ y8 v7 f

enough. If a plant is heavily infected
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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 + B4 ^) I! M1 V% K

to remove diseased leaves should be disinfected before being used on a different plant.% _7 d) e) f% L8 k1 \( ?' K! u

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
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GreenCure.
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Late Blight on Tomato Plants
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 公仔箱論壇  J. u% c; {1 M0 r% v- H& J$ J& \
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plants in a garden. Once a tomato plant 0 w4 w- W: {" T5 a( S' G

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, ; c. S# U5 g5 s7 H

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 blighttvb now,tvbnow,bttvb0 h* p8 [( P1 ?

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and tvb now,tvbnow,bttvb( ?2 S) v/ A( _4 f2 D

Septoria leaf spot infections will also help prevent late blight infections.

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