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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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) B- W7 j4 v5 r2 S( ^" BHow to identify Early Blight
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  D9 N! U- F9 u8 }+ C) \' etvb now,tvbnow,bttvbSymptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 公仔箱論壇  D! m0 G' ~& s# X/ R. S9 b" d
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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 公仔箱論壇1 o1 `! L6 Q3 f
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in color and form concentric rings, or a
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; N$ x2 a3 [6 v- R: W公仔箱論壇bullseye pattern
, as they grow. The area around the infection commonly turns yellow. As infections grow, 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。/ a8 V9 N% L( ^# Y8 j
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leaves may fall off. Extensive loss 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。: V8 X7 s) A- K
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.) X" {5 D% u8 [9 P* o: K

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How to identify Septoria Leaf Spot& _. H7 v/ s# y

" k* W/ ]2 `6 E& j公仔箱論壇Symptoms of Septoria leaf spot also start 公仔箱論壇1 Z) C* H6 A! s

+ y; w/ t, n" \5 K' R5 Yos.tvboxnow.comon 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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' V3 t2 c) m' n) J6 S& s; oTVBNOW 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。shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 2 |. c' T3 l4 h. Q, t
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Small dark spots, the fruiting bodies of the fungusos.tvboxnow.com: l1 l% \; h$ o' X; H

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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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* M; k% R$ Z* d; B: S4 x( ~: 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。infection of fruit
is rare.
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1 P* k3 O! q% mHow to Prevent and Control Early Blight and 公仔箱論壇( p8 s  i$ a* N% F
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Septoria Leaf Spot
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  b! G, p3 \  E! ^" y( C1 L1 zFollow the 12 easy steps below to enjoy 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。' k6 [: C4 ^9 u& j/ v* ?
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  ?) [/ b7 X  X\" D1 x
long season
of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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- a6 E3 [0 r# n; x# t) _6 R7 K% t& o3 ]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.
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Rotate crop locations. Don’t tvb now,tvbnow,bttvb/ R1 b+ i: z6 u  p

' h' s$ W5 Z" ~2 fos.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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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.: n8 H3 t& H0 z# s' r
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of tvb now,tvbnow,bttvb' W# d8 Z! ^0 v9 b/ y

8 v; H6 Y/ j" ]7 h& s" E公仔箱論壇fungus from the soil to your
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plants.6 F% [7 V/ V5 u2 ^

( m3 V1 |9 X$ T( i. GStake or cage plants to keep them 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。$ V0 q; a2 w" R5 D4 w" r- 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 公仔箱論壇0 U& P. o+ p+ V% x6 d% [- i
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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
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$ r" E2 j6 V3 Z0 \' ]- g. e* g- Rspace above the soil without any leaves. Do not use
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2 K( O2 p) b0 ?$ m  m公仔箱論壇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. os.tvboxnow.com# a- Z; {! W, L0 b2 ^( |$ R' k" `
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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fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are 1 y& _* s% ~: A, ^! Y6 Z$ }
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wet. Keep your plants happy and healthy. Weak and stressed os.tvboxnow.com; n; @! K( ?6 ?; u/ Z
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plants
are more susceptible to disease.1 }2 c; m  C* t) ]; T

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plant and any that have fallen onto the ground. This may help stop the spread if caught early 公仔箱論壇$ Q. I: y( X* u/ p- {
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enough. If a plant is heavily infected' |  d* I( x- ?- z  j( ]) J

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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 P3 Z+ x0 q7 `: ^  N0 r( H5 P# w
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to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb0 d: |& D+ R' Q" x2 i0 c! e8 @( j
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Spray plants to prevent and control the
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. s+ f8 H, S4 e' p\" Y5 d( [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。spread of Early blight and Septoria leaf spot.
Commercial fungicides are available. For organic gardens, try
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GreenCure.
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( ?+ S. f8 s+ \. ^os.tvboxnow.comLate Blight on Tomato PlantsTVBNOW 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。/ m. |9 K$ F' w: G
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 4 p4 t/ D* c7 c1 j4 y$ \4 `, K# w6 M
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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, 3 D5 h) ~/ Q% V1 A- T
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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 _# \- e0 }& x# q
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Septoria leaf spot infections will also help prevent late blight infections.
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