[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 Blight公仔箱論壇3 C; r" X  M* m% b
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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 5.39.217.77:88980 }4 x7 ]4 X1 ]8 p

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 公仔箱論壇& a! v8 [  b5 L) W

in color and form concentric rings, or a 公仔箱論壇% w2 d- q: M* m# B- o
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 5.39.217.77:8898, a* |9 N2 D1 z: j
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leaves may fall off. Extensive loss
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.5.39.217.77:88982 b, S* }, ?/ C2 O/ V2 T/ x

How to identify Septoria Leaf Spot

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.

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.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。; D2 a6 v5 \" i3 W9 o: x! [, F
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How to Prevent and Control Early Blight and 5.39.217.77:88983 r- I( B% o& h; B

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.8 C1 j) z( b4 {! ?* R" o! R
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Weed your garden. Some weeds, 5.39.217.77:8898; g  J5 p4 `8 d  f0 ~

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.

Rotate crop locations. Don’t 公仔箱論壇. ]% V$ c& b' J- j$ U  n- Z; _

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( O+ y( o  i; V% [$ W
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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 公仔箱論壇, r4 `; G+ ]9 Z
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fungus from the soil to your 5.39.217.77:8898. Q' k) ~+ g7 Q, p- I. t

plants.5.39.217.77:88984 x! z) [( _3 Y: \( m% Y
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Stake or cage plants to keep them

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 : f. i" @" Q9 c8 V5 f* Y5 O# h

space above the soil without any leaves. Do not use 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。% ]  W\" ~\" v# s# M4 }

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. ) m3 T% y& M5 a8 |" z$ n3 P* x
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
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wet. Keep your plants happy and healthy. Weak and stressed 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 P' r7 u$ M$ O- e) x
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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
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 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 n( Q  F8 W# F8 _& f5 m
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enough. If a plant is heavily infected

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used + D2 d& k0 e. I# U' w! D/ k* R

to remove diseased leaves should be disinfected before being used on a different plant.: E1 r2 `% \  L4 M5 |* L
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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
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GreenCure.5.39.217.77:8898# t5 P/ a/ K  t1 S- U1 Q; A

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Late Blight on Tomato Plants

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato

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% `3 O) V2 o2 K/ t, S$ U! b
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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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