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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
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7 L- B8 ?  \, w) |$ L: ~' S- X6 K1 h公仔箱論壇can 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 Blight
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& i$ x) A& ]/ g% d- }( wSymptoms 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4 ]3 o. ]( {4 `1 S# _1 J

+ q" D9 ^3 Y1 |& ctvb now,tvbnow,bttvbnewer 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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, 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。: W1 }) F$ J( s- |' m

4 e1 T# r- v) h0 tleaves may fall off. Extensive loss
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1 Y, p- {0 C; A0 Z5.39.217.77:8898of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.公仔箱論壇  @7 f  {) G* A+ n$ r
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+ U$ A# b, J" K6 X& U. {6 YHow to identify Septoria Leaf Spot
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Symptoms of Septoria leaf spot also start . G6 j% \; k$ V' i$ H1 Z  U  S

3 N3 f6 m. S3 S" {' Z/ ?4 X' f% son the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change 公仔箱論壇, h  c3 r5 ]3 y* P$ R1 A: N
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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.
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1 U, o$ i: ?! u7 P! q% Z% |tvb now,tvbnow,bttvbSmall dark spots, the fruiting bodies of the fungus
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 公仔箱論壇/ B5 `* v% T7 A/ }
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and dead. Stems can also become infected but
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$ p% _) O( r; e  t% p7 d% L5.39.217.77:8898infection of fruit
is rare.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。. B  w% \2 d* l; v! ]3 b. G
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How to Prevent and Control Early Blight and
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9 C$ i# H! N  I* v8 |tvb now,tvbnow,bttvbSeptoria Leaf Spot
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Follow the 12 easy steps below to enjoy a
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- p: A5 D( t& h7 l2 _\" b, T\" qlong season
of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed 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 5.39.217.77:8898$ [# P& ?5 _' t/ j+ P6 q) Z/ y# j

7 t; T. P! y0 Z( S1 h5 ztvb now,tvbnow,bttvbplant 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.1 q  ]) v) x& |6 [5 l! u
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of , `7 [& y. _# I1 A8 s/ F% k! z
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fungus from the soil to your
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plants.
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Stake or cage plants to keep them 公仔箱論壇' T! l+ Y6 ]( m9 k, r- E

) |3 F/ S4 w, s) ~0 joff 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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/ P  Y) i/ ?+ {: |5.39.217.77:8898cages. 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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space above the soil without any leaves. Do not use 公仔箱論壇2 j& f8 {  W5 I3 f) J: [! y. q

8 b9 v# N- ]. u/ t# ntvb now,tvbnow,bttvboverhead watering
.
4 D* g1 Y; H! 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。Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
3 Y5 b( u( U/ G- x6 @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 : h3 A  g5 S1 {' ?  }5 R

+ v+ X; D" U; C' h( x5.39.217.77:8898fungus 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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* B* t+ O/ K- I3 f公仔箱論壇wet. Keep your plants happy and healthy. Weak and stressed tvb now,tvbnow,bttvb- S! P1 E. _6 T3 ?; l/ Z6 r
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plants
are more susceptible to disease.
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Remove and destroy or throw away diseased leaves, both off the 4 j1 L- ]' i# m+ I6 R) q
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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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! S  e7 q6 G1 Y* W+ zenough. 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。\" a- C! C6 R( m$ P5 g9 g0 W
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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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% b- v8 _- K3 ?# X' Q/ e/ f/ F2 G  ?tvb now,tvbnow,bttvbto remove diseased leaves should be disinfected before being used on a different plant.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。1 u# [7 [! |8 `3 `" `+ g( |/ j

8 p. x3 g5 M$ ~& _1 I% A& u0 U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 5.39.217.77:8898: A2 h- Q# S3 u
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GreenCure.公仔箱論壇$ G' h2 D( c1 v* i' s1 N/ ?2 y

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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 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 C/ q7 M' g  b: m# `' i; G" p4 I

! X6 b6 F3 ]* wplants in a garden. Once a tomato plant
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' W/ Y( F+ R* ?+ B9 Z, q( j: }is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 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。; j2 Y/ \5 S# s* a; e

1 f5 [* c7 |' i6 Q0 E. k5.39.217.77:8898water-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 ; X+ t0 G" g8 y* [6 y
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Septoria leaf spot infections will also help prevent late blight infections.




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