[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.

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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 . ]$ L* I  j- U" P- B9 X
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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 5.39.217.77. r, h* J! r6 X% n& D

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, : o9 Z2 x3 r- B# [! @) _

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.

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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 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。2 c7 h6 O6 B% E5 P

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。0 F- E2 q7 b8 x# X
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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 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。( P4 Y# j5 `( Y2 L8 \

and dead. Stems can also become infected but 2 F3 X  \* F: p: p1 j, d\" B6 m$ d

infection of fruit is rare.
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How to Prevent and Control Early Blight and 6 b* W8 `, T0 |8 U' ~( g

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。, ?7 q9 U5 y8 B6 K8 \6 @
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Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb1 z; K3 Y3 A, J
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.公仔箱論壇; ^9 X. K: O1 a

Weed your garden. Some weeds, 公仔箱論壇/ U: v% {" W1 ]7 N! x

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.5.39.217.771 h) `/ r1 ^* \) M
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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。& n) ?5 S$ t7 l/ o" J( X
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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
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where tomatoes were grown.5.39.217.777 N8 @1 v# |9 C" @: k0 Y

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇  b% D; F7 }% ?$ P9 b
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 5.39.217.77# ?; d: N3 n9 m8 `

fungus from the soil to your 公仔箱論壇1 E( S( }! b7 l3 V# r+ y
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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。# p  N4 b$ J7 Z  }  s' g( L
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Stake or cage plants to keep them

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 6 ^' H- s0 w6 z. F$ f
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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,bttvb4 d$ e6 Q; m' U( N0 X" \' B4 ^1 x
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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. 5.39.217.77# P' M) W  `/ H/ n& ?7 K
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 ( d% D5 d3 [# l" U- [
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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 公仔箱論壇$ i) d# w% K6 U5 G9 w

wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.5.39.217.77' ^; t4 p' q: V/ i& D4 q
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Remove and destroy or throw away diseased leaves, both off the ) n* J  b6 }1 U( \  N2 h

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 tvb now,tvbnow,bttvb. L5 H7 O, Q' R' u

to remove diseased leaves should be disinfected before being used on a different plant.

Spray plants to prevent and control the

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 5.39.217.77' K) h' `6 o% A# T

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。# g9 y% \0 q4 R" B
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato tvb now,tvbnow,bttvb; ~% A& g: g" E% w7 Y1 ?! Z

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,
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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 blightTVBNOW 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。, a2 |2 o2 \( H# }1 ~; s) w

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。$ |* T3 w  w* A5 V3 C) \7 v3 ^
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Septoria leaf spot infections will also help prevent late blight infections.

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