[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   n- c& A6 s# N; O- m! l

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.tvb now,tvbnow,bttvb& D( x& S5 g: u
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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。4 ]8 @! r( p8 f# K) y
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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 ! D$ x. G! J& [7 `6 o

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 5.39.217.762 U6 r# n1 Y: ~" T9 d, M) O
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in color and form concentric rings, or a # N5 p' b9 `( s

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb' H; ]4 d5 q8 L! o

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 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 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。$ ]) S% |% a) g- x1 j/ d7 Q
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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公仔箱論壇/ I0 V! V) o% C0 h& y

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry tvb now,tvbnow,bttvb9 E/ _$ j" O/ f5 j! {

and dead. Stems can also become infected but

infection of fruit is rare.

How to Prevent and Control Early Blight and \" q. H8 g' }9 x0 ~\" Q% r
tvb now,tvbnow,bttvb# `3 V' n2 Y/ G8 G8 m; ^
Septoria Leaf Spot

Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb2 E+ |* t: T5 W0 D9 ]6 Q
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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, + z* B5 v# v/ u% h0 x! @# m
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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 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。& R. F7 z( d! i9 ~7 r7 m$ S0 j1 J  n

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。, o0 w; T+ r( W
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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.
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 5.39.217.76! _# Q, K, P5 X+ K/ r1 x# _6 V+ Z
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plants.
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Stake or cage plants to keep them 5.39.217.76& j7 ]/ x0 e* o0 H3 S6 H& s
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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
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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5 j& I: k* `6 ?1 i# N' Q' f' D5 W
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space above the soil without any leaves. Do not use 公仔箱論壇& W3 K* H7 C\" X( L

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 5.39.217.76: _1 _. t7 T/ x2 ^# m8 u) I8 T+ B
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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。' R' X& D9 S. L3 S. V8 Y
wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.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 H; n' J5 f2 X' S; P1 X1 i' z
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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
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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 ) G) I. }  Z5 ~

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 公仔箱論壇7 p8 v2 C- C\" W\" W/ Q

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try

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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

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 blighttvb now,tvbnow,bttvb0 z6 X4 d7 j6 v  f3 n/ p
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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, u& U% P& {* w0 I

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

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