[生活小百科] Early Blight and Septoria Leaf Spot on Tomato Plants

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Early blight and Septoria leaf spot infections most commonly begin in the early or middle part of the growing season but 公仔箱論壇" T- t9 X0 J/ }, i6 f
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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 Blight2 O# H, E8 K6 D* [: q
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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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* n" {2 Y0 T: N6 b. Xnewer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown , k; V5 U% D6 q$ I2 H/ ?3 k# `6 z

7 U$ ]1 J3 M, \tvb now,tvbnow,bttvbin color and form concentric rings, or a 公仔箱論壇$ @2 I9 n/ m* ^3 y
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb- k7 q. P( D" u) N5 N

# ^5 U8 u  Q. V/ r- |% b% ]1 h5.39.217.77leaves may fall off. Extensive loss 5.39.217.77: f( ]8 s1 {& S" s$ e2 f+ p
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.# E7 \  V, x* {, |' Q3 h
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+ @% B+ R) R4 B7 K; v5.39.217.77How to identify Septoria Leaf Spot5.39.217.777 S1 A" l/ y# g8 z. x% s1 r# w- w- `
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Symptoms of Septoria leaf spot also start
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; g; X4 B2 l" o5 H+ yTVBNOW 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。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。+ g+ k6 [0 M8 {0 {
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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。! k* o0 @5 _$ g3 a+ S5 g+ V

/ N! J$ p" `% |8 A公仔箱論壇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 5.39.217.77( T/ e3 L, I$ \5 R; i

! M( @& t; L0 a  f: X3 ~0 ?and dead. Stems can also become infected but 4 b2 g+ x$ i\" T; ^- U+ b

) y. p4 T1 d\" J2 H& p, E8 O- BTVBNOW 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。infection of fruit is rare.5.39.217.777 B" b& q6 S6 _
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6 A; }7 N2 G2 IHow to Prevent and Control Early Blight and 5.39.217.77  ?  V& ?% O7 q7 }. Z/ N' ^

$ Z% G7 q( j+ FSeptoria Leaf Spot
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' H$ R: A6 E9 Z8 z公仔箱論壇Follow the 12 easy steps below to enjoy a 8 k! T$ B  F\" U( |& ], ~\" w7 K6 d# m# e
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds,
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: y9 `1 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 公仔箱論壇* d+ y9 Z# d- ?- {' f2 E
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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
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, R% F: X7 ?; q. w) |% uwhere tomatoes were grown.1 o- J" M2 s: ^# N
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
5 F& ^: z7 D8 p6 a! V公仔箱論壇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
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plants.公仔箱論壇" O) o# U. a+ x) t
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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 ( V/ x0 u3 H  Y! W
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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 公仔箱論壇2 D* u5 c8 l* Z7 E
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space above the soil without any leaves. Do not use
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overhead watering.
3 g% L  s1 f* m/ c& z$ W& W5.39.217.77Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 9 w/ v9 a- v4 n1 O+ p' ?+ T7 p
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
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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 5.39.217.775 K/ K9 z3 u* Y
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wet. Keep your plants happy and healthy. Weak and stressed ! M! o7 t$ w2 w# d\" h\" F

8 N. E! |4 t7 r( Z8 }! jtvb now,tvbnow,bttvbplants are more susceptible to disease.
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# c# J4 w% y& f  {1 eRemove and destroy or throw away diseased leaves, both off the
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; K; `7 |$ @3 L+ J! ~5.39.217.77plantsplant 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 infected5.39.217.779 x, g9 U\" O9 d2 E5 Y  t

6 k- L' e; d* L- V% p; f1 H+ x# g, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 5.39.217.77$ t7 [, Z# d- Y1 j6 f% z  ?

( ?% J8 w% q! \# {: S' b3 {2 STVBNOW 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。to remove diseased leaves should be disinfected before being used on a different plant.5.39.217.779 e9 a! M/ g: }- R4 l8 s( m
公仔箱論壇+ }1 X' q* ^; x7 U, y. X4 o+ ~
Spray plants to prevent and control the
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- h( Q6 E4 v+ l0 F  E% P2 H4 H  y公仔箱論壇spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try tvb now,tvbnow,bttvb9 o2 z9 M' o% C; c9 h: a. D$ W

0 a% F! L( l# ^+ qGreenCure.
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0 c1 w$ ^7 K; B3 h) s5.39.217.77Late Blight on Tomato Plants0 ?0 i( _& E$ m4 T" G

# x1 a8 Z+ E! D公仔箱論壇Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato
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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。& N9 G& \( u+ T1 {+ Z& I+ B
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,
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2 V  w% f) n) Q$ Rtvb now,tvbnow,bttvbwater-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: X\" a% l# w( R\" ?: A/ ?; G* y3 ]: D

6 h\" T+ H- Y5 l8 J- f, f can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and tvb now,tvbnow,bttvb3 ~  {- U+ b3 @4 K

" I. J- R# j1 q' ]- ?7 Etvb now,tvbnow,bttvbSeptoria leaf spot infections will also help prevent late blight infections.