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

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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
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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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) E+ a! u  f- f% P* ~& W" W5.39.217.77:8898How to identify Early Blight
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+ B9 D- @; Q6 M. ?0 D+ S9 Rtvb now,tvbnow,bttvbSymptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to tvb now,tvbnow,bttvb; B7 D. M- b# p% ]/ V7 _! o" Y
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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
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  |% k; B" C4 }$ f  z2 A; btvb now,tvbnow,bttvbin 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3 o. `. T4 d) H$ E
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leaves may fall off. Extensive loss
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# Y/ Y, ?5 J2 c9 m公仔箱論壇of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.
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' L$ P3 |$ u0 i3 h% G9 ~  j: s/ S. K5.39.217.77:8898How to identify Septoria Leaf Spot
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: ?0 ^8 S! r* ^6 H5.39.217.77:8898Symptoms of Septoria leaf spot also start 6 a% j. g3 Q  c: ^4 `

) h0 U) x) z, o5 M' {on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change * Z/ \9 P# Q7 k3 R- ?
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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. 5 S. t8 l# G" Y- S* K: @: u2 Y3 i

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% B% X7 o3 I- F9 @( b5 l3 Y, r, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry tvb now,tvbnow,bttvb6 ~2 J) w, J7 E9 x2 Z+ x0 i$ _
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and dead. Stems can also become infected but 5.39.217.77:8898- G! \% s* C) S) }0 q
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infection of fruit is rare.+ R- r$ d4 M, a
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8 r" h2 l/ h) Y" OHow to Prevent and Control Early Blight and
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Follow the 12 easy steps below to enjoy a
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. f* P2 Z5 s# itvb now,tvbnow,bttvblong season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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" X1 H- C, e8 n) I, Ilike 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 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。( `% H" I! C7 v+ L! R
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plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 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。+ f6 }9 U) o3 d' m3 s3 |7 I4 S" `
tvb now,tvbnow,bttvb0 I# r. B1 h4 s* e
where tomatoes were grown." X% i$ n( R' P( M+ N% x

2 Z: I4 G. r$ E( r0 G2 DGive your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
  K7 }' k  w" x" f2 Htvb now,tvbnow,bttvbCover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 公仔箱論壇: v- o5 v% I) p1 ]
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fungus from the soil to your 5.39.217.77:88980 ]) t  z4 q0 d/ _% n  y

: Q7 i6 ?. [+ s( p1 M, R4 |plants.
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Stake or cage plants to keep them
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. V* n9 F9 z& |- _* [" x7 ?& W6 {tvb now,tvbnow,bttvboff 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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+ J/ e$ |; W4 r/ |& Y8 G$ w- G0 JTVBNOW 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。cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of 3 Z  i5 ~4 K! u7 X5 P# t

9 N, @- T; O/ h7 Aspace above the soil without any leaves. Do not use
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overhead watering. 0 |( Y( G9 F& W5 S  T: W
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 9 p: t$ U9 P7 g9 w* ?" N3 {
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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7 d+ n! P. {8 h: q1 P! p/ d; 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。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
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  N& |8 d% u! a% G% ?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。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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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 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。" c1 W8 z3 L. ?! W
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enough. If a plant is heavily infectedtvb now,tvbnow,bttvb0 n1 k0 J8 m! |6 o: K9 {( I
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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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- o1 X) v8 T7 |; w1 B公仔箱論壇to remove diseased leaves should be disinfected before being used on a different plant.
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- w) f. P2 `# nSpray plants to prevent and control the
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& R; G0 _5 n0 R2 T: lspread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 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。* j8 P' l% t( r* D& Y6 S

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Late Blight on Tomato Plants
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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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! h1 A% u. b6 G9 {5.39.217.77:8898plants in a garden. Once a tomato plant
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  `0 e( u2 a8 d: D' {7 `0 sTVBNOW 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。is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 8 I1 I7 M* G1 f" U( ^) q
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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% r\" }' N. d/ M! v& y- w) \

% U- o9 y0 `1 l$ a3 @  i* [, D1 I' C公仔箱論壇 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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