[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
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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 公仔箱論壇/ Z  l5 B. X8 f* V) x
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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 7 H9 {) C( \9 i- z2 s
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in color and form concentric rings, or a
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 0 Q" E7 m$ j; y# b, y: k
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leaves may fall off. Extensive loss , ^8 \) b. T: s9 o) ^# F5 B5 y7 ]
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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 SpotTVBNOW 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。4 Y9 G+ K) e9 s# S5 z: z* A  n
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Symptoms of Septoria leaf spot also start

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change tvb now,tvbnow,bttvb4 ?- f" q* _# o9 p  w9 i/ k2 M( W

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- P# s4 g$ l$ p4 y

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 公仔箱論壇! Z+ @: p8 }" F" n
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and dead. Stems can also become infected but
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infection of fruit is rare.www.tvboxnow.com3 d, O* ~3 P! s( }$ R, K( L

How to Prevent and Control Early Blight and
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Septoria Leaf Spottvb now,tvbnow,bttvb( k9 v& {) M: Y, H

Follow the 12 easy steps below to enjoy a 公仔箱論壇/ i/ \3 p4 i2 O$ |% @
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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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.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。5 z, ^& z1 a" O3 N
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Rotate crop locations. Don’t 6 M; c1 G' U/ n% Z
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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 www.tvboxnow.com9 ]! d) b/ e8 D! O  I- A4 @
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where tomatoes were grown.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 O  K# |/ x  I$ K# g# Q: _
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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 / G+ E8 z. I$ K1 m- b

fungus from the soil to your tvb now,tvbnow,bttvb- c9 f+ k4 |+ w

plants.
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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 www.tvboxnow.com: }" j/ d6 Z% B' e- K1 H$ a$ i5 ?2 m" I

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,bttvb( J6 }& V' C2 Y6 z3 q/ n
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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。5 E; k1 \5 H% k2 O

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 公仔箱論壇2 Q4 r" x& F4 U$ x, K0 A* i

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are tvb now,tvbnow,bttvb7 U4 g$ v6 Q* E6 l+ B3 f- b
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wet. Keep your plants happy and healthy. Weak and stressed www.tvboxnow.com# [' l, G2 {: F  z* _* V3 ~. G

plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the tvb now,tvbnow,bttvb) n/ M* b! |# \9 P  v
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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 infectedTVBNOW 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。- E% Q' z3 S2 J- J
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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 ) U' _  ?7 E9 i9 x6 E& N- ~

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 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。, E4 q! u7 H' R: u  m
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GreenCure.公仔箱論壇7 L- u$ Q: I' Q% O

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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 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; R3 r6 F$ p3 O3 g# ?; v6 u7 V

plants in a garden. Once a tomato plant ; ~4 u& J, `" j& c7 Q0 k) N' O  }
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, www.tvboxnow.com1 K. H# `8 D: s
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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+ s+ Z! `- _, B; k

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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