[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.公仔箱論壇1 B& L$ ?* M3 O% J% J
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How to identify Early Blight

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6 R* m# R5 l) r- K

in color and form concentric rings, or a

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
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.

How to identify Septoria Leaf Spottvb now,tvbnow,bttvb# ?1 B0 g) n, `
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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
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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. 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 Q' X0 k. F8 Z* W2 W% ]& e
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Small dark spots, the fruiting bodies of the fungus公仔箱論壇2 }3 J8 E2 }! a! s\" |2 H
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 5.39.217.761 ^) }2 Z; l" O4 L) p( V

and dead. Stems can also become infected but
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infection of fruit is rare.

How to Prevent and Control Early Blight and

Septoria Leaf Spottvb now,tvbnow,bttvb! h5 m: d& U$ O
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Follow the 12 easy steps below to enjoy a : J/ w) x5 O( N9 R( v

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5.39.217.763 ~& V; t* n3 p7 A
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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。* u) B6 B3 J4 z' B6 B0 w
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.; x+ F0 ]* H% ^, s5 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 " L: j* Z: D' {3 J0 G

where tomatoes were grown.tvb now,tvbnow,bttvb  m" A$ h2 x+ N
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.) y! M0 }5 j- }+ S, U0 a
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

plants.

Stake or cage plants to keep them tvb now,tvbnow,bttvb8 T5 M" V' b  V. E9 K0 e

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and , U6 w+ B: V- H& P: `* |

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. 4 z3 q4 i% M* p- l4 ^2 D
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 8 L4 ?/ m# c' f1 @
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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
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wet. Keep your plants happy and healthy. Weak and stressed tvb now,tvbnow,bttvb\" X7 H4 v) E; o2 v/ b
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plants are more susceptible to disease.公仔箱論壇8 G4 K; n+ d0 _5 I6 I7 F% r
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Remove and destroy or throw away diseased leaves, both off the 2 `: ^/ o: Q7 d1 o
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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 infected3 e& $ ], c  u% f1 m/ `$ s# m2 \/ ?\" ?

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 5.39.217.76/ k# o6 }( L0 I$ w. i& h

to remove diseased leaves should be disinfected before being used on a different plant.

Spray plants to prevent and control the 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。: K0 P3 D+ U% r; d1 }

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.tvb now,tvbnow,bttvb# E9 J& }$ L5 q0 `0 C0 x; q

Late Blight on Tomato Plants公仔箱論壇( Q9 ~: ]+ m( [& }/ |
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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。9 s( I8 K7 _, A
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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, ; F4 Z* T. U! x* v3 ~. i( A

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。2 t  O0 u5 ?6 W: I5 N

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

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