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標題: [生活小百科] Early Blight and Septoria Leaf Spot on Tomato Plants [打印本頁]

作者: 6t6t    時間: 2019-4-13 05:03 PM     標題: 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 ! ^4 N( ^6 R* u9 q/ T
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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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8 O& G9 k0 L  j5 P; O/ @How to identify Early Blight
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* W+ g0 k5 l, X' [3 _Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to   k( J! R7 Z* w( E) H8 ?

* c; [# h# C! H* R4 X" Y9 l5.39.217.77:8898newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown
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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,
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leaves may fall off. Extensive loss 公仔箱論壇6 M5 q$ G. [" v/ `% ]4 ], W4 [2 E
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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。$ V9 Y/ k/ U# V% r
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How to identify Septoria Leaf Spot
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0 g* h9 @- l6 N+ JSymptoms of Septoria leaf spot also start 6 A. O( x9 Z* `/ N, ~/ f/ C8 e; H- }. y

+ w6 h  k- ~8 C2 g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   j$ x( H; S3 Y+ U& F- G& d

4 V8 _+ a, v- D' _9 sshape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center.
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- U8 S% S+ w2 Y" ?3 L/ ZSmall dark spots, the fruiting bodies of the fungus公仔箱論壇3 T& W  i8 A7 a' G* }\" w; Q7 E6 G
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry tvb now,tvbnow,bttvb( h: \+ R5 W6 w4 X) n* [/ h

& @; N8 U* h4 H. A& t公仔箱論壇and dead. Stems can also become infected but
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* S  g0 l5 y: ^( qTVBNOW 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.+ Z) x! {: H% S5 R- C& |
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3 n$ J* d* e$ J; n* O% Etvb now,tvbnow,bttvbHow to Prevent and Control Early Blight and tvb now,tvbnow,bttvb0 q6 {% O- E3 o) m- d
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Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a
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5 u# ^! h6 w  t1 htvb now,tvbnow,bttvblong season
of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds, 5.39.217.77:8898% e: x7 U1 R, O6 V8 d2 g/ D" d0 Q

1 m! Y4 L' j8 X6 F% o3 _* w. ^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。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
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$ J- I3 S3 Z" E7 U+ F9 \公仔箱論壇plant 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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3 Z' Q3 @8 G2 y* X# V% H# N* Qwhere tomatoes were grown.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。& I: k& M- \# F. ]- {
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
4 E4 E4 Z; @6 N公仔箱論壇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
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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。. r' r1 }& u9 D3 D& ^5 V
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Stake or cage plants to keep them 公仔箱論壇* n% Z- l% Q3 n- }+ Z4 J+ k

9 s4 X# S/ m& a$ ~, @2 coff 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 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 d" x) W  ]6 y$ h4 ?& j4 R5 ?
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space above the soil without any leaves. Do not use tvb now,tvbnow,bttvb7 H& [; y& _& F3 `; z2 |' j* \$ ]& M
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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.
$ A$ ^, n! A. D5 j3 etvb now,tvbnow,bttvbConsider 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 公仔箱論壇! H7 f8 Q4 B, _8 S) V$ N  H

7 s* m% z! [4 c5 d$ b, \5.39.217.77:8898plants
are more susceptible to disease.tvb now,tvbnow,bttvb5 I) C" Q: l& c4 t

' j' ~: U2 |$ [# u8 aRemove 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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, y( \" A3 \. ^$ L1 nenough. If a plant is heavily infected5.39.217.77:88984 j5 V% P% N, T

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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 5.39.217.77:88983 C' g9 r  O+ m$ [' D. s. B9 c
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to remove diseased leaves should be disinfected before being used on a different plant.5.39.217.77:8898. f  g5 r: K- [3 b/ r; N7 z
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Spray plants to prevent and control the
6 \3 W) X0 F* o- t: Q. o. a; M8 _公仔箱論壇
5 d( A* w3 }0 \- P6 _spread of Early blight and Septoria leaf spot.
Commercial fungicides are available. For organic gardens, try
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+ M4 G9 o4 e, c# E4 Ntvb now,tvbnow,bttvbGreenCure.
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; B: z, K+ V9 K) q, p6 U公仔箱論壇5.39.217.77:88988 m9 x* z& L+ a* ]+ U; \: s& Q
Late Blight on Tomato Plants
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8 A; F8 L) {+ o9 H; TLate blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato
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plants in a garden. Once a tomato plant 5.39.217.77:8898) B" b4 q; H5 c1 }! `. e

) h5 H. g* N3 t3 @. `tvb now,tvbnow,bttvbis infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 5.39.217.77:8898- k" @9 M0 |' K* y% F
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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 % ]( n" E8 B+ k8 ], [! G
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Septoria leaf spot infections will also help prevent late blight infections.




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