[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 1 F/ Z- T. Y: G" a6 F1 L
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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* u' G1 J: L) V2 z+ X3 I5 w

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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

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown
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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,
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leaves may fall off. Extensive loss ! Q2 a( w. z. O9 H
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.: H* E6 A; S3 I) G+ [
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How to identify Septoria Leaf Spottvb now,tvbnow,bttvb7 q+ }8 E. _/ E5 ^6 N, q
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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

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 fungus5.39.217.76: D5 J: I- M- h

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 公仔箱論壇: A& i/ c+ [: S# A4 v# c

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 Spottvb now,tvbnow,bttvb$ K% z# l+ Q' ?* J0 l

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, 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。9 f4 U+ P& q5 q0 ^# V% P& c

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.

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8 z9 a  m, Z0 Z. O. W! b
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where tomatoes were grown.
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇. P* K# R: F0 C. G
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 U2 z5 D( V& L4 f

plants.' A" g) a& a  \  ~' X+ w0 I

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

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. 5.39.217.762 m* m0 Z6 T3 F% X4 l
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 ! f' z  w% ?7 `* N' ]0 c

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are , A  y* e0 u% G( }

wet. Keep your plants happy and healthy. Weak and stressed
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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 公仔箱論壇; j8 y) t\" O& v$ y) q/ {

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) k! m7 `+ j# i$ ~, i

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used ; w1 P# X6 H; q4 f

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 5.39.217.76% Q5 d\" z3 a$ S) \0 k

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 Plants5.39.217.76  l* P7 Z; D; J; d' T! s& U3 G

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 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 |" d$ F4 q4 x
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plants in a garden. Once a tomato plant 公仔箱論壇- W# B( k0 {* q

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 blight

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。& H) K# O+ y  P+ t& f! w- Y

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

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