[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 : y! q( S! H. I1 `

8 f, i, L; |6 _# d# n0 ]tvb now,tvbnow,bttvbcan start at any time. Infections can occur anywhere and are most severe in wet and humid areas.
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4 ~2 K& E& u  Z" bHow to identify Early Blight5.39.217.769 a9 C9 m% K- _4 O7 ~+ ^
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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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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 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 c  S2 E$ S- i! F' \. U6 v

/ ~- R2 @5 Q- }\" M# z4 o5.39.217.76bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb" s) j, B" X* P% P( L! d0 B/ _# K

5 |+ S/ y9 y9 I4 ^* gleaves may fall off. Extensive loss
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9 X8 l3 P- H! s8 Jof foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.5.39.217.76* x8 P3 J  i  j$ g4 c) j. r
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How to identify Septoria Leaf Spot
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( I) t! y& ^" @, r* F* l' }/ ?3 qTVBNOW 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。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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2 i2 T' G! E9 Q" r. r" ?' Jshape 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/ |6 S+ v  ]4 B  w4 Y7 p; C; f
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry tvb now,tvbnow,bttvb) S( l9 G  M# A; v* O4 t

+ [( n  M7 B) Q" Y; Y9 n4 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。and dead. Stems can also become infected but tvb now,tvbnow,bttvb6 D8 S, u. l. F9 }0 H; A8 l3 U

% O( J# D! Q. e4 n) j2 Finfection of fruit is rare.
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How to Prevent and Control Early Blight and 5.39.217.76# B5 ?& d  q+ p( i+ v- m
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Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a
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* V- o- R& @/ f- f/ O; E7 O0 H4 V/ ]公仔箱論壇long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes." |4 _5 I3 S$ m0 b# F! F
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Weed your garden. Some weeds,
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.tvb now,tvbnow,bttvb( p" z) d# w) _- }0 D/ e

/ W$ \# [8 `8 k: S2 C+ fRotate crop locations. Don’t 5.39.217.762 x  q& _% _' R+ U! `! _
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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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where tomatoes were grown.4 @# L, W7 D7 f3 |, ]* r8 i
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
4 c! b' E8 W# M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 tvb now,tvbnow,bttvb3 K# t; s! _% c
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fungus from the soil to your 2 R+ h7 F. m: S( U; w/ G% A# C  ]

# W3 r$ h# T  O4 |5.39.217.76plants.公仔箱論壇+ D( m* o4 z8 O* M8 W& r
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Stake or cage plants to keep them tvb now,tvbnow,bttvb+ x: n6 d/ v6 c* U; U
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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 公仔箱論壇' Z$ l. F5 S1 L, o' {% u2 {

* l9 P/ y, j/ R4 M2 {" `$ I3 HTVBNOW 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。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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* ?+ q! u, q& @% K7 Z1 fspace above the soil without any leaves. Do not use tvb now,tvbnow,bttvb  c0 z/ v7 B5 [& _2 v
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overhead watering.
9 \: ?! Z! t! H4 eTVBNOW 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。Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 5.39.217.76" t) ?, {7 c2 U7 q9 E7 `: X4 H0 q
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 5.39.217.76# g3 n8 S* m% Z5 y$ P! u' w
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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 tvb now,tvbnow,bttvb9 L! t) `3 U6 Q5 g
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wet. Keep your plants happy and healthy. Weak and stressed
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. h- l5 ^8 c3 |tvb now,tvbnow,bttvbplants are more susceptible to disease.! E9 ?3 r' t! t# f: H- G5 y
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Remove and destroy or throw away diseased leaves, both off the , i# B9 S% J+ O) y3 r

2 D# q/ x+ v0 u1 G( }9 \8 z) X; x$ k5.39.217.76plantsplant 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
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, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used tvb now,tvbnow,bttvb' i' ]4 S8 y' x7 e
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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 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。* |  @) @( P+ l: o7 M3 f* j: y

/ P# u6 D9 U& e1 V5 gspread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 公仔箱論壇" O  d; n2 x. C* O3 v" \( l

3 Z8 C# ~& X4 ?$ e+ `. Z3 W* W/ p公仔箱論壇GreenCure.5.39.217.76- u# W, D) \% l: `6 r
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Late Blight on Tomato Plants5.39.217.76) C( i0 `. D+ p! @7 L
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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。8 J% r( S" N, |% C
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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,
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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; T. L, y- d2 G\" j& J, a8 l

\" N! r( _; S\" S% x) I) W0 w  Y% l6 V9 M can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and
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- K7 K' a, y) eSeptoria leaf spot infections will also help prevent late blight infections.