[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.

How to identify Early Blight5.39.217.76& T6 `# k1 V# M3 Y

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to " S1 ]1 _. @" \) h
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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 5.39.217.767 r; M! n- ^& n* V  I$ q

in color and form concentric rings, or a 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。! c1 ^+ e+ {. @7 D( F) r- b
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 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。# e" @' i- G- ~: e

leaves may fall off. Extensive loss 公仔箱論壇$ {; [0 ~' O- u- I$ p1 v1 O2 P

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb* u3 O$ x% J! t! w! O
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How to identify Septoria Leaf Spot5 T2 r& L/ ~& \; N# Z! Z

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. ) G, g- M- s0 {; \- J! u% r

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
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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 tvb now,tvbnow,bttvb: R( B7 X- p% ~/ k/ B

Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb5 p# J. h# N8 B
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5.39.217.764 S& Y! A2 \  ~" J  L4 x& R+ T% a, b
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Weed your garden. Some weeds, 5.39.217.76! s( V- N4 R( c1 Z& }- H, T: I' I

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.: i" Z; [$ Y4 V6 k: `) F: D' P1 {

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

where tomatoes were grown.tvb now,tvbnow,bttvb1 @- G8 L2 w, z* D- X8 @; I

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better., X/ Y! {6 c5 l& G2 m0 \
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.
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Stake or cage plants to keep them
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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 tvb now,tvbnow,bttvb1 e% a5 a0 T( ?( h5 I5 N

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, R3 i* m/ y2 j. f- C) o! h' Z5 }+ }
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space above the soil without any leaves. Do not use

overhead watering. * g6 \3 S8 ?+ |: C# C) K
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 " \# A5 g- {$ {  v: }
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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! `7 B' b7 G: L/ F1 |$ X! {
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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 5.39.217.760 x) ^$ z7 l0 j! \$ z' W& T3 I/ w( E

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 5.39.217.76! \* L3 z5 D5 |
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enough. If a plant is heavily infected5.39.217.760 o$ }$ P7 d\" e* T9 Y6 D

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 公仔箱論壇% i9 Y/ C0 S4 z' r

to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb$ ?( ?3 r* J& s6 r, O
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Spray plants to prevent and control the 5.39.217.76- Q, }2 r$ y\" W' Y. v( M, |  V

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 Plants公仔箱論壇. F, c: P/ S5 t. c0 W

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 公仔箱論壇# i; J+ ]* g$ M: K) H

plants in a garden. Once a tomato plant 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。& W- k. e; S& ~  |# W' \* o

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,
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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 blight
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and + i8 m9 j7 I/ ]: X* T4 ?$ U) e
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Septoria leaf spot infections will also help prevent late blight infections.

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