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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 + i( O, u  e: Z" K
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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

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 , T9 C* h3 Z5 t" ?5 i" m& j" d  Z& _
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in color and form concentric rings, or a

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb# D4 h5 m; \! c: N. T4 E4 g1 D7 R
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leaves may fall off. Extensive loss tvb now,tvbnow,bttvb4 Q6 D! Y# b3 _5 ]4 F
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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 Spot
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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

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 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。& R, r$ b1 U/ X  H; P" M2 J5 [
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Small dark spots, the fruiting bodies of the fungus公仔箱論壇4 P. X6 `+ D5 l. F% F% f  |$ K

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 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。3 R/ M2 H2 ?1 p+ J# g

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。& @1 J' |/ l( w2 F7 c7 D$ H) x, ?

How to Prevent and Control Early Blight and tvb now,tvbnow,bttvb2 S$ O+ \: P6 v) O( O( s+ v0 _- n/ N

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。5 g1 D) O  I7 Z8 H3 u
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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.tvb now,tvbnow,bttvb0 N; s$ k9 i8 {4 X, C8 g
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Weed your garden. Some weeds, ( K8 P  Y7 b2 W* a4 c1 _

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

Rotate crop locations. Don’t : I% `7 r  Z1 I% G) C+ A

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) V- H9 }, A* W4 W
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where tomatoes were grown.
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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 5.39.217.77:8898% G  S$ a1 M/ O2 q; T( k; A

fungus from the soil to your 5.39.217.77:8898/ e  W. k2 d9 T7 ^' \( M1 y
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plants.
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Stake or cage plants to keep them
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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
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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,bttvb, i, L5 s3 P8 b& W: A

space above the soil without any leaves. Do not use
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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" q; ~" Z2 Z  I& O' X

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are 5.39.217.77:8898+ Z9 A& n8 A* n$ }1 Y
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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。- U& `7 j; ~+ H9 |' ^, H: ?' k
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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 公仔箱論壇# G8 N& h7 M; E+ H% ?  k$ |
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early
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enough. If a plant is heavily infectedtvb now,tvbnow,bttvb- h9 u* K: S+ |; s4 D9 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 5.39.217.77:8898* {. m$ Q6 m9 g2 F

to remove diseased leaves should be disinfected before being used on a different plant.( j2 J3 \$ u- u" h" L
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Spray plants to prevent and control the tvb now,tvbnow,bttvb. n+ b+ y) q; I. P, h2 N

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try % o) i" m0 @& t& j
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GreenCure.2 Q0 I, M/ S# g

Late Blight on Tomato Plants4 ^8 r- |+ W: m8 u& b( X  l

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
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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" P1 a& J: ?3 Y- I
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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
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and / I' _! W: Q: h
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Septoria leaf spot infections will also help prevent late blight infections.

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