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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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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.
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2 w( t4 M# m' f公仔箱論壇How to identify Early Blight公仔箱論壇! N/ M9 h; I3 d9 e7 J# q2 E
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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 9 E" {& m' K& n
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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 & l  o9 {7 l) I" V9 x

  [* c3 f! B# t# m% _5.39.217.77in color and form concentric rings, or a \" K( D; q0 l5 d  t/ n

* d% I- r0 R8 C' bbullseye pattern
, as they grow. The area around the infection commonly turns yellow. As infections grow,
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7 }7 t. \+ Y# K" ~* jleaves may fall off. Extensive loss
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.6 y9 d( g6 U3 l: Q$ O' B
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How to identify Septoria Leaf Spot
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Symptoms of Septoria leaf spot also start 4 e" ?) F& [% F1 P! F: c+ [

# x; L; n. t& ~- 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。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& F5 l) T1 R+ s! b$ ]% }
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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. 公仔箱論壇5 r) a* e8 h" a2 `* d! G/ o
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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
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and dead. Stems can also become infected but 公仔箱論壇% `8 B4 [; U7 _) l0 q) Q

' Q5 A2 [) }) f! [5.39.217.77infection of fruit
is rare.tvb now,tvbnow,bttvb& G. X: ^$ ^; |

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How to Prevent and Control Early Blight and ( _7 R* T: p2 z6 |, Q

4 v$ Q' `\" ^1 _9 m+ l  z3 R\" G, u: s2 w5.39.217.77Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb1 n4 o. [- D3 P3 i4 y

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of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds, tvb now,tvbnow,bttvb# O/ ~% i/ m; k" D% p' ^# M
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.+ e( u7 W9 o* E$ E2 A% D

2 k5 {3 f- \8 d5 O# E5.39.217.77Rotate crop locations. Don’t
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' D% B. w# w, O0 c# Hplant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas tvb now,tvbnow,bttvb  k5 s% [8 n! i( q7 x- F
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where tomatoes were grown.
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6 W9 c; z' ^5 [8 u5.39.217.77Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇$ w6 W7 w. I7 ?) z
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 - B( m- ~8 ]! W( l& X$ `' R

- V* O. l+ v* ^; b' S- ITVBNOW 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。plants.2 w6 ?5 f1 c' g3 z+ z  ?
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Stake or cage plants to keep them 公仔箱論壇5 h# }; J2 I9 F) S" T
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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
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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3 u6 I& {# z) K
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space above the soil without any leaves. Do not use
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* s' o' o$ u, m3 `/ ~5.39.217.77overhead watering
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Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
0 P, E: R& L7 A* L  Z7 f公仔箱論壇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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8 L9 W+ M- ^; Z" I  a; 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。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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) `. q( ~; r& o: p* Owet. Keep your plants happy and healthy. Weak and stressed tvb now,tvbnow,bttvb9 t/ Z* l3 e& ]$ \& b
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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
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plant and any that have fallen onto the ground. This may help stop the spread if caught early
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2 ?, C6 c! c, r2 H5 a5.39.217.77enough. If a plant is heavily infected# w* t- s  v1 _/ r2 E& {0 m
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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
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4 z/ }! i! I$ g5 ]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。to remove diseased leaves should be disinfected before being used on a different plant.& ?9 ?8 H, b" \. J* W

# o2 _. c" V, g/ Htvb now,tvbnow,bttvbSpray plants to prevent and control the / {8 N) l4 A- D4 x
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spread of Early blight and Septoria leaf spot.
Commercial fungicides are available. For organic gardens, try % p0 v% A+ l# Y3 A, i+ i* N" n
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GreenCure.& x  F0 o0 V  I' h( P
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8 r: W) n8 k; g& o( `  U; Z' D# vTVBNOW 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。Late Blight on Tomato Plantstvb now,tvbnow,bttvb, Y% y* R% v- e# L. A
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato - I3 V  @& d' n2 j

; _6 f0 F$ Y: m+ [5 B公仔箱論壇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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( X6 b5 l& C# Q6 n' `9 ztvb 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 blighttvb now,tvbnow,bttvb! x\" ^  I* v' |

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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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Septoria leaf spot infections will also help prevent late blight infections.
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