[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.tvb now,tvbnow,bttvb5 G# r/ c) ?5 [$ k1 _

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How to identify Early Blight* \! o" [& c- u2 p5 _8 A% q

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to
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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
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb2 [9 q# h; q, P3 M& e# b: a, x7 A
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leaves may fall off. Extensive loss

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.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。+ ^- u' Z0 V+ x( J9 w
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How to identify Septoria Leaf Spot

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

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. # |9 r3 R& B( j- N
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Small dark spots, the fruiting bodies of the fungusTVBNOW 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。\" `. y9 Q. X' @7 z+ A
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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' t& m$ y* |1 V/ Q* `7 r2 q% l
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and dead. Stems can also become infected but

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。+ c# R; f+ c& A4 Z0 ^6 c% i0 X

How to Prevent and Control Early Blight and

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。. I1 ~6 @2 ]: v

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, ( K  e4 _6 W) b5 g; J; L

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 tvb now,tvbnow,bttvb# t9 S7 ~$ v% A3 [# ^4 S

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 公仔箱論壇# z$ a. N/ x( }. W

where tomatoes were grown.公仔箱論壇7 l  y' |, Z1 s) {( V7 A' M; ^

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.5.39.217.77% H. k$ d& {- R& c7 T$ v4 K
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2 t* a- K$ L7 F7 p9 V1 g

fungus from the soil to your

plants.

Stake or cage plants to keep them 公仔箱論壇# i( X$ S' [8 M2 V* _" a3 B
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off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 公仔箱論壇7 B8 A4 p  a) _' M2 k: z  [' m

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of 2 k$ c7 m1 c* H$ G# d) f

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 公仔箱論壇5 t" q* n9 z* t9 c- \, V

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.tvb now,tvbnow,bttvb7 X8 V1 ~) m$ ]. 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 5.39.217.775 s. \. z4 }- \9 n$ L# O  U* ~- L4 a% |

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 5.39.217.77. {4 V% j2 A" _0 t5 X
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to remove diseased leaves should be disinfected before being used on a different plant.# A% [# S" V/ h0 U. w
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Spray plants to prevent and control the

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try

GreenCure.
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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。  M. f* o8 @% q2 r: [7 [

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,

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 tvb now,tvbnow,bttvb3 N( H2 J! p; [0 F5 D& L

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

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