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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 5 ?# ~6 o6 L# x' M# S3 n

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.

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 * U4 s! B2 M4 b2 ?/ C7 e- _

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 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。- E0 _1 ], ?# o, r7 H  J) ]+ c" A0 U* o

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,
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leaves may fall off. Extensive loss 公仔箱論壇) r9 m- K  G& |7 u6 p- s8 W

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

Symptoms of Septoria leaf spot also start 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 c0 p$ s( h. z

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change ! W2 f, W9 x0 {# m) a+ $ D4 c8 N0 K
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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. 5.39.217.77:8898" F$ N( a4 F# J! \/ G2 U- u  J

Small dark spots, the fruiting bodies of the fungus
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry   D& N0 f" K# z- a* i4 x
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and dead. Stems can also become infected but 公仔箱論壇7 }% \( a) d' t: R! b$ \\" a
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infection of fruit is rare.

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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.tvb now,tvbnow,bttvb4 w, q; C5 n. h4 N
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Weed your garden. Some weeds,

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.& d# a' {  ]! Z9 p
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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.公仔箱論壇  O3 U. n; S, T! T8 t

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 tvb now,tvbnow,bttvb1 w# A5 Y% A  u+ F
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fungus from the soil to your 4 [; B# t5 ]: |3 g' d* }( Q% w6 v

plants.5.39.217.77:8898+ B5 A  }( e! I, t2 r$ j( {
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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
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space above the soil without any leaves. Do not use

overhead watering. & u, W( J! L% k9 {, s$ g. X- n
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1 c2 b* v) Y1 U4 @
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 7 i, {  G* C5 X/ @# J9 X

wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.tvb now,tvbnow,bttvb  t( d4 X* i& i' V; @2 R
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Remove and destroy or throw away diseased leaves, both off the 5.39.217.77:88986 \2 T1 r- y+ I8 t
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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公仔箱論壇! x( \0 T: K\" V; C4 ~; Q5 u, E  x  y
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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 ( R& R+ a7 Q& X( _+ m: O: v9 m
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to remove diseased leaves should be disinfected before being used on a different plant.; f( l$ s( |1 Z# `9 s0 S1 R: ]
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Spray plants to prevent and control the : q8 h3 t9 K3 [
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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 Plants' e2 `& H3 q9 Y# h0 M6 G
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato ; X! N1 u0 B4 i( e6 J
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plants in a garden. Once a tomato plant 5.39.217.77:8898% ^6 J/ {& T, y) V
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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 blight5.39.217.77:8898' ?& e: }' Y5 z
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 5.39.217.77:88982 J8 \* E# B; @
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Septoria leaf spot infections will also help prevent late blight infections.

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