[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.tvb now,tvbnow,bttvb: o* u% M9 X2 w8 _+ U8 Z5 B6 Y
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How to identify Early Blight5.39.217.765 y, `# L/ j( A4 h; C. i

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 8 M- V4 }7 N% o3 X4 t

in color and form concentric rings, or a 公仔箱論壇5 R* u\" ^  R2 ]# v/ J2 a6 a  k
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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。/ i6 Q8 \5 {/ ?/ c
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leaves may fall off. Extensive loss 3 d* o$ k( `: i4 s# s

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.9 `% n# m7 T( n) r4 A

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How to identify Septoria Leaf Spot

Symptoms 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。* L$ `, N# R1 @9 M' F

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change 5.39.217.76, a% w! ~6 }. R' M& k% k

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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Small 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 . C) n! a( h+ L1 ?9 J1 ]+ j

and dead. Stems can also become infected but 5.39.217.765 }# j0 i' T6 N/ b# A; M2 i
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infection of fruit is rare.
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How to Prevent and Control Early Blight and
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Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.公仔箱論壇; u6 g1 E' p& F& i
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Weed your garden. Some weeds, 5.39.217.76- |* g, b3 m$ ]/ Q

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.公仔箱論壇. }0 L$ t2 D1 X0 l

Rotate crop locations. Don’t tvb now,tvbnow,bttvb- F. `' V" f# S
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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 tvb now,tvbnow,bttvb: ~3 f# S8 T6 t/ }' H/ j7 @! `  G

where tomatoes were grown.

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of - |' o; ^% ~3 k! k

fungus from the soil to your ; q1 n  f, J% |3 Z2 n
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plants.
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Stake or cage plants to keep them $ T5 v9 U/ U9 ?" p* m" L. G
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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% W$ O  ]  }7 w  k1 O2 M! Z7 `" F

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of

space above the soil without any leaves. Do not use
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overhead watering.
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. tvb now,tvbnow,bttvb% A4 f5 F) J; B1 [" 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 6 i( \# C6 ]! y* T9 r3 J
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wet. Keep your plants happy and healthy. Weak and stressed 7 Q$ x  f3 ]2 f: L, 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 6 g4 G$ S, ^% f- ?( U1 N+ B
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early

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
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to remove diseased leaves should be disinfected before being used on a different plant.

Spray plants to prevent and control the tvb now,tvbnow,bttvb( ^. A& V2 L& ^8 s4 F/ N0 M

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.5.39.217.762 d/ K) H% u+ q) w5 Y5 M

Late Blight on Tomato Plantstvb now,tvbnow,bttvb- ~/ c. F9 S# F- ]; I1 V& W
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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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plants in a garden. Once a tomato plant

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,
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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 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。$ }7 e  w0 j, D% F: W( Y) c
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Septoria leaf spot infections will also help prevent late blight infections.

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