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標題: [生活小百科] Early Blight and Septoria Leaf Spot on Tomato Plants [打印本頁]

作者: 6t6t 時間: 2019-4-13 05:03 PM 標題: 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.5.39.217.77:88989 E3 P, x8 G& h& B# k( N0 s

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How to identify Early Blighttvb now,tvbnow,bttvb4 h5 {: {2 u# i! |0 _3 w3 B2 K0 r
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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' G# k! K" a& Y2 q, {7 |: c

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 7 S\" L/ }& j  c/ u4 |
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, , R  @, o. t* s& \  _! \
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leaves may fall off. Extensive loss 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。4 Z! Q0 D( S% _6 l

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 Spot5.39.217.77:8898) t+ Q' m1 Z; Z* O2 v

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
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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. 4 J! F- [8 \8 f/ J2 M/ Q5 v
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Small dark spots, the fruiting bodies of the fungus

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
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and dead. Stems can also become infected but 公仔箱論壇8 ?* Y\" C  T3 `$ Y9 j' p& T9 f7 k

infection of fruit is rare.

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How to Prevent and Control Early Blight and
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Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5.39.217.77:8898" I# ?- m( V2 S9 n6 k" c, h5 Q
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Weed your garden. Some weeds, 5.39.217.77:8898' T* n2 {6 W  `1 N% }6 W; z/ O

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 5.39.217.77:88984 }/ k4 H% h& a! 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

where tomatoes were grown.公仔箱論壇$ J$ U3 N9 Z  {8 S( x( N

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.4 h" \( k% f, l$ B% i
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 公仔箱論壇* g  x. h  j* F/ ?# i! W
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fungus from the soil to your 5 s4 v/ \! i+ E/ v. |$ ?( ^

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 8 V$ @' `) u" X. i; {% l+ q

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 : ~) K( ?6 k  c. r* n
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overhead watering. % \# w$ q$ c+ C$ O8 n
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. tvb now,tvbnow,bttvb6 n, I( }) b4 g5 m$ ?) 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 & Q0 E9 b  c. c9 m6 h, s

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are   z! G0 J  t+ D$ [. N# B/ W* A

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。5 |# |! W! F$ e4 @' n# E

plants are more susceptible to disease.公仔箱論壇) h2 q3 C, Q6 R& ^6 R( `8 I% `% k0 M

Remove and destroy or throw away diseased leaves, both off the ! T1 ^& o6 H: t  y5 Q4 O\" q
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early
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enough. If a plant is heavily infected

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used

to remove diseased leaves should be disinfected before being used on a different plant.公仔箱論壇0 U- x% k/ r" o- b! |: ^# v

Spray plants to prevent and control the 5.39.217.77:8898% J9 y. H5 q& }6 i' M: R
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 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 T6 K1 q) r2 Z

GreenCure.5.39.217.77:8898; y) M+ s! c/ i/ m7 p, L, g3 n; n

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Late Blight on Tomato Plants5.39.217.77:8898- p. `' X; x6 e" \7 L- u) {
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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。; D( h1 T* Z0 _; E( e
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plants in a garden. Once a tomato plant
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 公仔箱論壇# M( c7 P  ?! t$ N$ X; P

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 blight5.39.217.77:88989 k8 X% B  |4 T- c( U4 L8 q2 z. y  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" l  S5 T& Z- D
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Septoria leaf spot infections will also help prevent late blight infections.

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