[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.! I: Z: W( p) z5 F+ p6 l' g( d
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How to identify Early Blight/ c- e" h1 r) {/ I
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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 # F9 e1 g2 m) Y, M3 C% D! G
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in color and form concentric rings, or a tvb now,tvbnow,bttvb5 v+ B7 u0 [; Y. c8 S' ~* c7 L

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, $ N4 P* j6 D/ y
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leaves may fall off. Extensive loss tvb now,tvbnow,bttvb/ Y$ c' \$ s# H- \

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.

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How to identify Septoria Leaf Spot
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Symptoms of Septoria leaf spot also start
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on 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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shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 公仔箱論壇: B. N* z/ K& ~7 U% u% ?

Small dark spots, the fruiting bodies of the fungus

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 5.39.217.76; B, e9 p2 O. `3 v) `* h
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and dead. Stems can also become infected but
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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 Spottvb now,tvbnow,bttvb9 m8 A  \/ p7 ]) O+ e1 j6 `
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Follow the 12 easy steps below to enjoy a
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.公仔箱論壇& n; X' z2 P7 N: j& T% J

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 7 r+ F( t5 a) N" V
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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 公仔箱論壇; p( ]$ g8 O, w; Q" y

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.5.39.217.76: k/ V. [- c0 u- [! R
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 tvb now,tvbnow,bttvb, S6 e6 O7 G0 U
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plants.

Stake or cage plants to keep them 公仔箱論壇5 @8 z: {  x# B6 R* o7 O) D" ^
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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
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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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space above the soil without any leaves. Do not use 公仔箱論壇8 V6 t0 B\" |4 e0 K
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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. 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。. b5 V- ]! L7 E) c- M
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 ! d/ C0 B3 a6 I( _' S- o
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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 公仔箱論壇9 i4 j5 J4 r2 B- ]3 l5 g  J* n
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wet. Keep your plants happy and healthy. Weak and stressed 公仔箱論壇5 G\" m4 z4 c2 j3 ~9 p% q/ S. J( h

plants are more susceptible to disease.tvb now,tvbnow,bttvb" e3 b8 ^+ }; H0 p0 \

Remove and destroy or throw away diseased leaves, both off the 公仔箱論壇5 e5 J6 V+ ]2 y$ X
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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 infectedtvb now,tvbnow,bttvb% I+ L5 T& E2 M' Y
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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 公仔箱論壇1 [/ V  x( V! j: v( D. k* S# c: i
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to 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。( y  g- w' J$ C2 x4 l3 ?
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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 tvb now,tvbnow,bttvb; ^# A0 z# b$ k

GreenCure.& `5 V5 P/ I- o' H+ \5 P
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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 tvb now,tvbnow,bttvb. I* z- A* `0 Y- _- H5 a* H2 E  V

plants in a garden. Once a tomato plant 5.39.217.763 |' u7 u+ ~: Q/ C

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, * V* R# Q9 N% u% a* z
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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

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and tvb now,tvbnow,bttvb+ }( ^4 ^& E( p# c! u) i

Septoria leaf spot infections will also help prevent late blight infections.

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