[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 5 Z( f% J5 ?& {

can start at any time. Infections can occur anywhere and are most severe in wet and humid 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。+ c! `/ p3 `6 u9 Z- w
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How to identify Early Blight

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to tvb now,tvbnow,bttvb/ Q. T# g( T' g0 A/ @/ M4 i2 K0 ~
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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

in color and form concentric rings, or a 公仔箱論壇! V' N+ n* C' A2 w! }9 c

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb4 C  v( i, g7 j* [

leaves may fall off. Extensive loss

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.& C6 X0 y, n: G' R* `; p/ @

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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 . ^/ o% [4 b0 d! K) m! G
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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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Small dark spots, the fruiting bodies of the fungusos.tvboxnow.com% X; T4 l\" _- T: p# u

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 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。8 P' m& s  n5 v/ t; [, \

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 Spot8 z0 \: J$ s5 O; K! i9 k! |
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Follow the 12 easy steps below to enjoy a 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。# f; @+ I# @( t  T' k# W/ M; v) }
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.

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 U8 z; L! W0 s3 a& f) _8 o" \

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas : \( f0 `& }  t$ y7 T

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.
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 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。' t- f9 y3 L+ l2 f4 S- y2 y
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plants.

Stake or cage plants to keep them os.tvboxnow.com2 b: R3 T1 Q, d$ K; |& J* V1 J/ g; |

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 , R- W  N& Y' E8 Q# \, u, P* d
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space above the soil without any leaves. Do not use

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.
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 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 A/ W& r: W' D& d, _, T
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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 os.tvboxnow.com# V$ [( O* b( V. M
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wet. Keep your plants happy and healthy. Weak and stressed os.tvboxnow.com# b; k  A$ L/ q$ ~6 p

plants are more susceptible to disease.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。( X" i/ i3 `& \4 t" k* i

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 os.tvboxnow.com0 D1 k4 `3 z" N2 ?0 C  Q7 B

enough. If a plant is heavily infectedtvb now,tvbnow,bttvb' ?8 J3 M6 U- `8 V7 p6 P% K

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used * m2 v! T2 D6 P4 h$ p1 z

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

Spray plants to prevent and control the

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.tvb now,tvbnow,bttvb3 T, w/ c! c% v4 ^9 M3 U! _

Late Blight on Tomato Plants

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, 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。( `) p3 g" A& m& Z2 G

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 blightos.tvboxnow.com, p- F. ~; W  p9 e7 J8 w% Y) d
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and

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

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