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[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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+ O8 J; M$ N) f& bcan start at any time. Infections can occur anywhere and are most severe in wet and humid areas.+ n# x: p; V2 q% R$ @
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* U/ T9 E0 m' z: }% U! _, C, v. BHow to identify Early BlightTVBNOW 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* t  i4 \! d% e" q" ^& o
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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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( t! A- B* o$ P: Q/ Y2 V  jin color and form concentric rings, or a tvb now,tvbnow,bttvb8 [* F& S/ d  }; b% F: ?: Q

% S1 N' c! \% M1 ybullseye pattern
, as they grow. The area around the infection commonly turns yellow. As infections grow,
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1 S4 A$ `7 p$ Z2 z5.39.217.77:8898leaves may fall off. Extensive loss 公仔箱論壇: g; z4 ?; [  ^3 u0 d

& X" c8 [9 Y* x4 e" `( mtvb now,tvbnow,bttvbof foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.5.39.217.77:88982 {9 n6 J+ [, U

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How to identify Septoria Leaf Spot% }( @4 Y) \# }8 p2 R
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Symptoms of Septoria leaf spot also start % _% `7 Y1 J4 ^: s& ]3 H# [
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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 5.39.217.77:88987 [0 L) P# F; R- S

3 \! |( M7 {8 \; O: m9 V5 E6 o$ qshape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. tvb now,tvbnow,bttvb& b2 f5 g  ]" m9 y1 w' w+ m/ p
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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 公仔箱論壇7 }- o( k; y8 `# l7 Q+ u

$ s: b$ V* q" ]' n3 a$ Eand dead. Stems can also become infected but 5.39.217.77:8898% `\" `4 L5 C' G3 v0 Z
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infection of fruit
is rare.5.39.217.77:8898% i8 L5 D$ N( p2 U& r0 i0 Z9 y
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: I$ j6 b9 X' F1 vHow to Prevent and Control Early Blight and
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Septoria Leaf Spot
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% N; z) L7 a* X- Z  x7 A2 o: }tvb now,tvbnow,bttvbFollow the 12 easy steps below to enjoy a
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) @- z, E  Q7 t+ h; c! }long season
of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5.39.217.77:8898& u. w& u+ q4 j) ~  O! _" `+ e2 A/ j
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Weed your garden. Some weeds,
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2 Y# ~3 f1 I3 Z0 mlike nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.tvb now,tvbnow,bttvb; P0 v5 M5 U; L. j
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Rotate crop locations. Don’t
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+ r3 Y! A7 q4 J) Q8 @+ s/ F* j& c5.39.217.77:8898plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas ; R& W3 ^% _. A  G; I* b
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where tomatoes were grown.
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇  V# s) c+ l( ^; p2 D& ?
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 5.39.217.77:88989 P! {* c3 @% T$ K9 k, H9 \

; I* n) k. s* w+ f4 T* {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。fungus from the soil to your
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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 5.39.217.77:88982 O: w$ E5 @5 h7 b
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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 " F! I: p, H: ^( G& s

! Y1 H5 o. e" v/ F% }; 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。space above the soil without any leaves. Do not use
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overhead watering
.
3 l3 p4 F- U8 n% z- Q$ ^Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
( N2 |: |: R9 e/ a  U; J5.39.217.77:8898Consider 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
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wet. Keep your plants happy and healthy. Weak and stressed tvb now,tvbnow,bttvb# M: H' y8 n! d5 e8 U# Q+ l% r+ e

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are more susceptible to disease., x6 w( Q8 }# E

( ?: S% V& ]" ]% O. r  V5.39.217.77:8898Remove and destroy or throw away diseased leaves, both off the 公仔箱論壇0 ]; D7 X  ]& [- J7 {' V\" X
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plants
plant and any that have fallen onto the ground. This may help stop the spread if caught early
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8 `$ V7 L  V" }( ~* j( menough. 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 . K) z6 @' m% i7 w
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to remove diseased leaves should be disinfected before being used on a different plant.
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4 ]- @8 f& R: Etvb now,tvbnow,bttvbSpray plants to prevent and control the 2 |% m8 q& p4 L9 A/ x: }' F
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spread of Early blight and Septoria leaf spot.
Commercial fungicides are available. For organic gardens, try
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Late Blight on Tomato Plants公仔箱論壇" o7 k0 n1 _% {! H& Y7 |
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato tvb now,tvbnow,bttvb1 ?8 O# s( {: b. q  [

7 P; G1 u/ a- ]3 Gplants in a garden. Once a tomato plant # Q# A9 a& t/ H' x* q

. O* E* \0 i* `! L# b5.39.217.77:8898is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 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。0 T9 Y$ k0 l4 x& E1 p: F; I& e
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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公仔箱論壇3 \# J% Z0 q# }1 U1 |& s
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and
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5 {  f7 o% @, ]+ y9 SSeptoria leaf spot infections will also help prevent late blight infections.
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