[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.
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How to identify Early Blighttvb now,tvbnow,bttvb3 O- f, p( N$ h$ T( Z) |

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
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in color and form concentric rings, or a

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow,

leaves may fall off. Extensive loss 5 ~" _. o: d  Q8 l1 e. y

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.os.tvboxnow.com; P% ^. h0 y' A$ F* d% b1 g) N  t$ U

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How to identify Septoria Leaf Spot$ K% Z2 P( d# E; U6 l
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Symptoms of Septoria leaf spot also start tvb now,tvbnow,bttvb- h- [! ^+ x3 g- r( R- k8 U

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change

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

and dead. Stems can also become infected but
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infection of fruit is rare.公仔箱論壇* t- n- B: `; u9 \7 w. A3 K

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 公仔箱論壇. |6 k, W0 h9 j0 _4 G; ]. W$ r

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.tvb now,tvbnow,bttvb% f' Y" H/ P; f# _! p

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

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas

where tomatoes were grown.公仔箱論壇( l% t) U# Y$ \0 L# C7 H
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.tvb now,tvbnow,bttvb' f1 g/ |! u0 o8 ^( h
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of

fungus from the soil to your

plants.
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Stake or cage plants to keep them tvb now,tvbnow,bttvb& z  }7 Z1 _/ D; O" z

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and os.tvboxnow.com3 z1 C% {9 I0 l7 v
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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 tvb now,tvbnow,bttvb1 u7 U7 \$ b# `" x5 w8 N% t
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space above the soil without any leaves. Do not use 公仔箱論壇; x5 F$ l0 z/ }$ \3 t
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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.
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 6 ~7 Z$ `9 T+ ?. f

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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plants are more susceptible to disease.+ s) X2 i6 R* [# O9 b3 A

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
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enough. If a plant is heavily infectedtvb now,tvbnow,bttvb4 s/ n\" V) L$ S( i5 f3 |# _
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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

to remove diseased leaves should be disinfected before being used on a different plant.
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Spray plants to prevent and control the 公仔箱論壇% d4 s6 _, S( l

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.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 W- w$ N/ i) k
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Late Blight on Tomato Plants公仔箱論壇' X9 H& g1 D9 G, `$ e

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, tvb now,tvbnow,bttvb- V7 R/ e7 \: v( t
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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 - }) V% R9 f/ {* m, q
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Septoria leaf spot infections will also help prevent late blight infections.

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