[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 5 A. i' ?# H9 g+ M$ t" O# ~" f

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.www3.tvboxnow.com3 r4 I& F* {3 T% n

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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 ! ^) r+ z$ z0 @  p% u  G- P1 N
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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 tvb now,tvbnow,bttvb. G4 o, O5 ~" h* {# K: o7 u* _% ]- B! V
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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, www3.tvboxnow.com4 ?- y( O: P4 ?6 q( g! W

leaves may fall off. Extensive loss
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.# B& l1 Z/ o; M- e1 l

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How to identify Septoria Leaf Spot
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Symptoms of Septoria leaf spot also start - j" W2 W- Y  d+ w: ?- _* P7 ~

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change # l$ k- o: T( H, \: k

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' T$ L4 S  [: v& y; g* y
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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9 Y/ B- ?$ y: a, v
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and dead. Stems can also become infected but
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infection of fruit is rare.公仔箱論壇0 F) u3 \+ `3 M; C& \

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How to Prevent and Control Early Blight and

Septoria Leaf Spot

Follow the 12 easy steps below to enjoy a

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds, # v% y) W- T  z3 E  B
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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。3 |" z6 ^$ t. O7 Q- E# W7 K; Y
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Rotate crop locations. Don’t 6 W  e0 n. V, i% W& @% F: f

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.
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.www3.tvboxnow.com) v: W2 x' \4 X9 h8 \3 z
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 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。6 e* u' ?# s8 ?; M5 q7 l

fungus from the soil to your

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 公仔箱論壇- _' v1 X, y. s2 L3 Y4 W4 f3 l

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,bttvb7 k. [/ t; O% f  X) ]

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. 公仔箱論壇; r( F3 w* c% }, S/ l
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
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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
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wet. Keep your plants happy and healthy. Weak and stressed 7 ]5 }; F. o& B8 }

plants are more susceptible to disease.www3.tvboxnow.com: _7 K3 Z, D- c- y
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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

enough. If a plant is heavily infectedwww3.tvboxnow.com1 d8 t/ O. N6 n' I+ K
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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.www3.tvboxnow.com( B& r' p2 K& U; e/ q
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Spray plants to prevent and control the 3 L# @( N. v( S

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 8 {0 l2 }* p5 }) H7 @6 \- o) l

GreenCure.www3.tvboxnow.com$ `" i' k1 D( ?9 e

Late Blight on Tomato Plantswww3.tvboxnow.com+ R% V$ N, }4 ~% F
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 公仔箱論壇$ ^* K) D) R" G! X
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plants in a garden. Once a tomato plant 6 ^# s" _9 `* ~5 t. P9 T+ r

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,
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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公仔箱論壇. A* Q! E2 T% I0 r. R5 [

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 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。, H8 v& \9 }4 u
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Septoria leaf spot infections will also help prevent late blight infections.

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