[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.公仔箱論壇0 ]9 q# O3 H8 C4 Z: Y' f& c
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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 公仔箱論壇4 Z) w6 K' n8 Z0 g. a3 S
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in color and form concentric rings, or a . ~8 [. |+ _. H6 l. w8 ~

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 5.39.217.76" R* V' e' |- E0 K  @% D

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。1 N& K4 t9 {: V
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.% {+ x6 f% Y# U+ d  j* o' E
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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 : e2 i0 M, x9 X) D- v, ]
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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.

Small dark spots, the fruiting bodies of the fungus公仔箱論壇0 {* m. E+ g9 a0 q% ~% Y

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
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and dead. Stems can also become infected but
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infection of fruit is rare.tvb now,tvbnow,bttvb4 y8 u0 c1 Y: g/ D+ G, B
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How to Prevent and Control 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。5 o$ ?7 r0 I4 F$ H& Y9 B\" Z

Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a ' I! F9 f, D2 h) W% g4 x
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.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! d/ B2 k; {5 n1 Z% n& Z

Weed your garden. Some weeds,

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.% o6 q* W1 c% B( n' q0 D

Rotate crop locations. Don’t
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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.- W" q  U: o" o0 [

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇. }" @0 B1 x" i& ^7 Q* [* S1 b
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。" P8 @" E* B2 }* [6 Y
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fungus from the soil to your
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plants.

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 5.39.217.76$ T4 p  ?+ M, o  t: r/ {# N
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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

overhead watering. 公仔箱論壇7 ?; P# \  o6 V
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,bttvb4 v! f+ h$ n, V
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& E; m0 {; M+ l% R0 V! A

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are ! s7 V, q7 g9 M" n6 Z$ d9 ~
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wet. Keep your plants happy and healthy. Weak and stressed 5.39.217.76- q, `, r) w$ Q% @: Z( z3 l6 A% E

plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off 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。( ^5 d( {4 [0 W# [
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 公仔箱論壇: S6 g0 t! J! g/ 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 5.39.217.764 A) g: h% L7 |$ Q$ e

to remove diseased leaves should be disinfected before being used on a different plant.5.39.217.766 n! U' r2 ~0 q/ I, g
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Spray plants to prevent and control the
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.

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Late Blight on Tomato PlantsTVBNOW 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。7 \9 F( l$ T, W- b
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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,bttvb) B- L+ a6 n  h$ D7 b$ G
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 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 l( F, f) M( [% u2 G$ j

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* |5 ~/ V$ N; y\" z9 N! l

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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