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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 公仔箱論壇& }+ |9 {0 g  d. q/ f( a
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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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4 W. A" i4 s: s! aHow to identify Early Blight
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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 www1.tvboxnow.com7 y& O0 G- |9 F

$ ?9 K/ }- U& C9 fwww1.tvboxnow.comnewer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown
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+ F- j# V2 w2 c* _7 A2 A) N* x公仔箱論壇in color and form concentric rings, or a
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bullseye pattern
, as they grow. The area around the infection commonly turns yellow. As infections grow, 公仔箱論壇; U$ M5 T7 |; j

! Q& x- H- Y7 r8 x6 i. \7 \  Uleaves may fall off. Extensive loss 公仔箱論壇4 e) [2 X  F; B
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.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。3 a. p- O; f7 q5 ]6 S9 b
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How to identify Septoria Leaf Spot
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% G8 m2 N" N7 ]$ Q* [: pSymptoms of Septoria leaf spot also start 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。/ D% l0 V( l  y8 z5 f

, t, q# \$ x+ G" B- z* Q% ?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
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, R" H+ A. P( {$ D6 k公仔箱論壇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。/ \9 \7 X8 s: c

! k* B8 s3 Q4 D7 uSmall dark spots, the fruiting bodies of the fungusTVBNOW 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。$ j; e% c* Y! R5 T( k  y

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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry www1.tvboxnow.com4 i4 W% z0 s0 D$ F

: x! z- f5 Z4 Q3 c+ F' W' z$ Eand dead. Stems can also become infected but ( g$ J) U  K3 Z! w4 L& g3 E& H: `
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infection of fruit
is rare.! z# W/ o! h* B' t, G

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' }/ T* p8 V6 r, ?7 j3 A' B公仔箱論壇How to Prevent and Control Early Blight and
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Septoria Leaf Spot
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; V4 A8 u+ ?5 G. z$ A) E- Twww1.tvboxnow.comFollow the 12 easy steps below to enjoy a 7 |( h+ I3 ?- l/ L; q8 z

) A+ S+ I2 R\" g+ i\" v7 v+ owww1.tvboxnow.comlong season
of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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+ Q: R1 v3 i: l- Z+ z$ O$ `1 B5 M5 yWeed your garden. Some weeds,
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/ v4 v! \" F& g. c5 C+ @公仔箱論壇like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants." N" f! I& \3 W' i! t

+ p6 p  _+ d. Q" E1 }% r, ?公仔箱論壇Rotate crop locations. Don’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。3 l) y  D% W" R+ C) w5 `6 l# R# ^+ x

" a: c9 M3 U0 [2 }- k! S( f' Nwww1.tvboxnow.complant 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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8 d; g  I: }( o- M4 h/ q, WTVBNOW 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。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.' A. k% |1 N1 ~2 ]
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 www1.tvboxnow.com: \% U; o/ m" r& N( Y

, T  F3 D3 Q, j. s) |plants.
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' ~; C" \% L4 @* d1 X. D% twww1.tvboxnow.comStake or cage plants to keep them
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) U/ i8 b, N- @+ N7 c# }0 h4 yoff the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and www1.tvboxnow.com, ]5 ?" P4 j: l: u# f$ l  k/ v
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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8 Z3 `6 T- K& O  b: f, I
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space above the soil without any leaves. Do not use
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) s3 ?\" ~! e2 u* w8 f, ioverhead watering
.
* C) O& e- ^: W; P+ M" N. C, ~tvb now,tvbnow,bttvbAvoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
) A' M$ {3 J  ?' k- ?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。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 公仔箱論壇& J; N7 N* A4 D/ v% J2 b
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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 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。& R% y- {7 ~) x$ a# {+ g  [

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are more susceptible to disease.
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9 h+ i' P5 V' x公仔箱論壇Remove and destroy or throw away diseased leaves, both off the 公仔箱論壇\" s3 Z7 n2 V0 W\" q

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plant and any that have fallen onto the ground. This may help stop the spread if caught early tvb now,tvbnow,bttvb* ]# |9 P- b, l
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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 5 N9 x+ d: D0 [  A! ^& z! q
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to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb9 Z" D: v. `9 m! H# a

% s3 y  k, |( J  S/ J* j% V公仔箱論壇Spray plants to prevent and control the
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spread of Early blight and Septoria leaf spot.
Commercial fungicides are available. For organic gardens, try 公仔箱論壇. J5 x7 D# _, X, j0 \# ~1 j& D
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' O1 e+ l7 w6 c; {+ b0 b# ELate Blight on Tomato Plantswww1.tvboxnow.com0 T2 y" L; y+ U6 S8 o
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato
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& L  i$ _% H6 f3 J% G: O公仔箱論壇plants in a garden. Once a tomato plant
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) `$ B# t2 d$ M; Yis infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 公仔箱論壇) K, @. x9 E! |0 X/ `/ g
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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
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and ; ?6 |1 N. y, y0 N

# M7 a" [, G: K, \Septoria leaf spot infections will also help prevent late blight infections.
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