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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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) W9 a4 e4 `$ k  ?0 i4 dcan 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 Blighttvb now,tvbnow,bttvb& b7 I& Q7 v) K9 I

& a* w, @) f- q, W9 }5 |% v0 h$ vSymptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to tvboxnow.com' ~  V, @8 t6 X6 j

# X$ W& i5 m3 @* B9 C* {newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 公仔箱論壇; q( A5 \+ K$ A% N- }+ h# j
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in color and form concentric rings, or a 8 f$ y7 b: C! _9 H$ S# J; t

. Y2 a- U% `4 t& v* Y& A! o公仔箱論壇bullseye pattern
, as they grow. The area around the infection commonly turns yellow. As infections grow,
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leaves may fall off. Extensive loss tvboxnow.com( I7 L5 d2 X0 Z$ j
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.
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2 n. U3 m) n5 e1 t4 z9 xtvboxnow.comHow to identify Septoria Leaf Spot
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! {8 R- _# i% |4 |tvboxnow.comSymptoms of Septoria leaf spot also start
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" i# V, ?' R# ]9 ?( \; m公仔箱論壇on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change 5 J8 h+ F! `- V. C5 g

' `+ }7 `9 c2 I; vshape 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,bttvb0 A6 G* g: g5 |2 a
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Small dark spots, the fruiting bodies of the fungus4 W# M, V1 v, {* a

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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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  [7 q! y8 H6 b: f公仔箱論壇infection of fruit
is rare.
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How to Prevent and Control Early Blight and
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Septoria Leaf Spot
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, ^' z5 I* Y$ P6 Q5 ]* ntvb now,tvbnow,bttvbFollow the 12 easy steps below to enjoy a \" {! ?- p7 z' H- N

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of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5 X: C, g# w) N

0 Y/ g# t" e: }: q. n: @tvb now,tvbnow,bttvbWeed 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" W. _) ]8 H& D5 U1 M7 C

5 J: g# N5 W7 y5 D" qRotate crop locations. Don’t
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* C4 n# _3 t* t$ Hplant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 公仔箱論壇  u" O1 W7 \  I2 I
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where tomatoes were grown./ _& n1 L5 V5 K# s( }

' d& f5 w: `, u, Q% x: Ltvb now,tvbnow,bttvbGive your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
- v5 Y* j4 l/ L2 R1 P1 _$ Q( f- nCover 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 ( |2 o) r+ `; J" s1 g8 V1 t
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plants.tvboxnow.com, `# M5 }' D; f' `* e7 b8 v0 T
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Stake or cage plants to keep them , `* ]6 N3 L/ {7 F3 D, M+ v' [

6 Q) S1 W* |) k. v! A! |1 T公仔箱論壇off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and . Z1 e: p0 {: c! ~
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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- D; ]3 U! U7 K; p4 G4 a) M5 c( j# @

' X: B: Z2 ?- _space above the soil without any leaves. Do not use
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overhead 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. 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 ~3 v+ |' ]1 H0 A; v; [; b
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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! M# ]9 I& |/ N% l0 x& T- ~8 Dfungus 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
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plants
are more susceptible to disease.公仔箱論壇' v. c: Z; J8 Z
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Remove and destroy or throw away diseased leaves, both off the
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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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enough. If a plant is heavily infectedTVBNOW 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+ C! H$ ]1 U, Y& t$ a# c

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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 - p9 H/ F1 u% ~" |, l
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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。$ p7 R& t% D/ J& z  V; l
公仔箱論壇/ T: |, j* Q' ]
spread of Early blight and Septoria leaf spot.
Commercial fungicides are available. For organic gardens, try tvboxnow.com# g" ^! S1 D2 R& s3 i1 e6 r
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GreenCure.
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Late Blight on Tomato Plants
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+ E& ^! D. P' j2 U+ F+ p/ {公仔箱論壇Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato tvboxnow.com- R& Z$ x/ Z! v: J$ s0 Q
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plants in a garden. Once a tomato plant * w  t8 ]  z* \( k$ O* z5 t

# f! N! ^! V! @* Q1 _4 {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 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。/ h. V3 Y; S1 ^, _# t

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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 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。9 F: f9 z6 S& u
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Septoria leaf spot infections will also help prevent late blight infections.
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