[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 2 b0 K+ a1 [! E4 j, P
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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,bttvb, J! v) |& |5 ~# k5 G

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

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown
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in color and form concentric rings, or a 5.39.217.76' C5 E) T# S- ]8 `) v

bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow,
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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。' E- M- u" Z- J! I0 H

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb+ J1 \  @5 }* p+ _, Y5 Z, X

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How to identify Septoria Leaf Spot" M, D# v- v9 }9 Z

Symptoms of Septoria leaf spot also start 公仔箱論壇; r* ^2 K& ~9 v; W* j/ S9 f" Y% Z

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change
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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. 公仔箱論壇( B8 h3 I( i. U0 E4 f5 j9 ]

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

and dead. Stems can also become infected but
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infection of fruit is rare.
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How to Prevent and Control Early Blight and 公仔箱論壇7 _* e( R$ l; d/ q

Septoria Leaf Spot
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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,
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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 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。; S9 A+ `% |! y6 D1 l/ h" l+ a: b& A

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas tvb now,tvbnow,bttvb9 x. i) K- O5 r6 b: Q& [

where tomatoes were grown.5.39.217.763 S7 H8 @9 L6 |( k. i
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.) W$ U* @8 i) e$ g
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 5 i- n) |9 ]( k9 S/ z! q* e
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fungus from the soil to your
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plants.$ A* w8 n4 f/ n- e8 [- c8 `( [; T: z

Stake or cage plants to keep them tvb now,tvbnow,bttvb/ u7 o) w! w' [3 C8 w7 C8 V
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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

space above the soil without any leaves. Do not use
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overhead watering. 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。: v4 I* K; k/ s$ ]& z
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 0 ?2 E$ d# c7 k! w9 `" t

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are 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。+ E; E7 \5 ?, c: C) {
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wet. Keep your plants happy and healthy. Weak and stressed 公仔箱論壇, R: m  G2 G+ U9 N5 j$ N* u! {

plants are more susceptible to disease.6 ~7 U. c: p/ p( J: z  c5 x* F0 d
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Remove and destroy or throw away diseased leaves, both off the tvb now,tvbnow,bttvb% [% @* S& B$ V$ V- c
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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 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.! [" m: Y- E7 {- P" p' C) P. e
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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 tvb now,tvbnow,bttvb/ U5 o; N2 D# W% L, h& {
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GreenCure.. {/ k# B5 E2 e; B
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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

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 blight2 F1 d9 k. N/ i5 F  ]

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 5.39.217.76* q+ [1 `6 D; v: h
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Septoria leaf spot infections will also help prevent late blight infections.

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