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標題: [生活小百科] Early Blight and Septoria Leaf Spot on Tomato Plants [打印本頁]

作者: 6t6t 時間: 2019-4-13 05:03 PM 標題: 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% \1 f) E; G# n: @4 n

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 3 p: W2 J  b* {- X+ A

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 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 B8 X4 ]' E6 a* b

in color and form concentric rings, or a 公仔箱論壇* \- Q! _9 N$ l8 D1 b0 m, }8 S

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, * ^$ z/ y0 f& K1 l3 q# k

leaves may fall off. Extensive loss

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 Spot
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Symptoms of Septoria leaf spot also start 3 D9 t. h1 v3 Z: d
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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 5.39.217.77:8898$ x  x$ b3 m3 @9 j1 m2 w& g

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+ S$ u( {" x6 ]2 q% Z" y
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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 tvb now,tvbnow,bttvb3 J' D1 Z! L" a9 B' f" D# D1 r

and dead. Stems can also become infected but

infection of fruit is rare.
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How to Prevent and Control Early Blight and

Septoria Leaf Spot

Follow the 12 easy steps below to enjoy a
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes., S' x  z; x( \( \
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Weed your garden. Some weeds, 公仔箱論壇4 ]# K% L7 Y3 {! s( x
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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。: `8 X3 o2 _8 q+ `5 i
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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 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。( N; i! H& ^" ]
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where tomatoes were grown.5.39.217.77:8898  o) G& d% Y  X. X; {( t0 }$ ?
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.5.39.217.77:88987 ], i# g& k; A; |
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
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plants.
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Stake or cage plants to keep them 5 a. U: o  `9 Y2 d# h" X

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 tvb now,tvbnow,bttvb8 L& r* e; E" v
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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 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。, t0 t7 T0 q0 B+ L$ t$ M) D4 B0 x

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 ; u5 t4 q7 I\" N  F2 {$ `4 M& a

plants are more susceptible to disease.* n! N1 f2 F- h2 O4 ~# t6 z

Remove and destroy or throw away diseased leaves, both off the 公仔箱論壇; ^+ L\" ^2 a6 P6 C

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。( L8 o/ s9 ]. x9 x  v& E& f4 Q

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

to remove diseased leaves should be disinfected before being used on a different plant.0 x; G, _" N' E2 q- r$ s

Spray plants to prevent and control the 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。$ o. k, D  h* S) R) s+ j

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。8 y6 t( @6 [! A; q* \% E! x/ M  i

GreenCure.

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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
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plants in a garden. Once a tomato plant 公仔箱論壇  s* m7 s* ?- l2 ]

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 9 ~( i2 X  }! F2 R

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+ B0 c8 q3 {0 r

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 公仔箱論壇. q9 q6 U" q& ?1 X5 G5 \
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Septoria leaf spot infections will also help prevent late blight infections.

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