[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 9 r! L3 i/ s* }1 ^% ~. T: r
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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.

How to identify Early Blight公仔箱論壇. X, ~! a. L( l" y0 g- d

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 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 C% S% y/ |8 H, ?  {4 r
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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 ( E; s. F8 @4 T
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in color and form concentric rings, or a 5.39.217.77: A- {7 L2 T4 F
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow,
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leaves may fall off. Extensive loss 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( v! S& ?8 s3 J6 j
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.

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. 5.39.217.77$ {4 o( P( s7 w- l/ y

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 公仔箱論壇( L/ G( \2 Q7 j, @
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and dead. Stems can also become infected but tvb now,tvbnow,bttvb* P* M  r' W8 f' Z8 w2 [

infection of fruit is rare.
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How to Prevent and Control Early Blight and 1 k$ v1 O6 s2 o6 O# A% {

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.

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.

Rotate crop locations. Don’t 5.39.217.77# z' ]9 A) _: b0 @6 q, R
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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

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。' Z3 B+ X' m$ j9 [

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.tvb now,tvbnow,bttvb$ Z: {/ {$ d- U# j
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of tvb now,tvbnow,bttvb+ ~# Z1 R; U' W# N' i

fungus from the soil to your
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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
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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

space above the soil without any leaves. Do not use 5.39.217.77' S\" V3 X( f7 g% c

overhead watering. 8 {* v5 d! V& h, a$ s  {
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. tvb now,tvbnow,bttvb7 O9 j9 [. g3 M: b! G- m! W
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, ~- c: c( K" ~, P8 T8 W
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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: ~, z' P! S* M4 o( S7 @
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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。! V4 b& B2 m' V  s. g% l, }
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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 % \, d& P' `  L/ M$ S# P6 A

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early : _4 ^7 ?4 F; o7 O4 G

enough. If a plant is heavily infected
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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 & @, U9 h5 m2 l+ w: e; `
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to remove diseased leaves should be disinfected before being used on a different plant.; o$ o4 h7 B8 a" L

Spray plants to prevent and control the ' k- G3 f. }4 T9 B

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.7 {7 ]' J% E0 ^0 d, i% L
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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
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plants in a garden. Once a tomato plant tvb now,tvbnow,bttvb9 S9 {1 |/ `/ D; `

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 公仔箱論壇7 q- {# P5 ?1 L9 j  P) f
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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

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

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