[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
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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 ) `9 y5 r8 ~# @

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,
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leaves may fall off. Extensive loss 公仔箱論壇' ^8 ?4 |  h" L& g/ G

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。( C) T8 ?8 V) V. B% c8 }/ [
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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 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。+ C* K7 q* r: ^5 F

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 公仔箱論壇: c/ W6 D. X7 h8 n4 |* U

Small dark spots, the fruiting bodies of the fungus
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry tvb now,tvbnow,bttvb3 z/ ], g" H* y: ~" s6 Z0 ^3 B7 X2 l) ^
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and dead. Stems can also become infected but

infection of fruit is rare.

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How to Prevent and Control Early Blight and

Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb2 ?1 m  ~: F8 K  R! i. e
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.

Weed your garden. Some weeds,
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato 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。# g6 C; J% Q5 n) q$ L) v- ^
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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, H6 L* }6 a; Y/ e

where tomatoes were grown.www2.tvboxnow.com. O  i, M7 h. e2 d- S
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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

fungus from the soil to your
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plants.

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
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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
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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。0 u7 Y0 \7 {/ A+ `5 u
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 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。  g# B8 B) ~  n! w$ [3 B5 W
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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 公仔箱論壇- ?# {( a3 b+ E+ X0 e0 ~" }! v

wet. Keep your plants happy and healthy. Weak and stressed 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。! |& m7 i) ?6 o$ j! [: b4 S
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plants are more susceptible to disease.
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Remove and destroy or throw away diseased leaves, both off the

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early . C+ N6 w2 |8 T% ^% y1 p9 i* C9 u7 w

enough. If a plant is heavily infected4 {7 ^- F. I: J6 B
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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 9 d6 H0 A! R( I8 r
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to remove diseased leaves should be disinfected before being used on a different plant.www2.tvboxnow.com4 ?& S& g% _( V. g2 k5 N' q- c1 Q

Spray plants to prevent and control the tvb now,tvbnow,bttvb1 x4 ?2 o# u4 g+ @0 R1 j4 e& N; q3 S
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try * S( |( ^1 E* |( U2 c$ ]
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Late Blight on Tomato PlantsTVBNOW 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。$ ~9 u& b# y: [3 }1 H/ z
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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,bttvb9 b8 A' X# t  I, T% G9 ?

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 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。: \; Q8 v8 n4 l5 u% D8 {
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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 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。: [* w3 _- z: t: z
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and tvb now,tvbnow,bttvb" i$ v' Z* g) q, H( q* C$ H- H
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Septoria leaf spot infections will also help prevent late blight infections.

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