[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5 x& W, E9 |! @! K

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 公仔箱論壇* M  z6 h" U% x8 X! |. K+ T& A
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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) k. ~5 W# o/ W$ j: c
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in color and form concentric rings, or a tvb now,tvbnow,bttvb5 I& I5 S9 ^/ u' C0 y

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

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb5 P  c+ C; _7 H0 X$ v
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How to identify Septoria Leaf Spot
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Symptoms of Septoria leaf spot also start
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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. & M" r* w( |# G9 r

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 tvb now,tvbnow,bttvb; K3 b) u0 M: o0 \0 S' [# N
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and dead. Stems can also become infected but

infection of fruit is rare.

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How to Prevent and Control Early Blight and
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Septoria Leaf Spot* n" ^% J( {% ~# v
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Follow the 12 easy steps below to enjoy a 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。! G5 m6 m2 j, b, k* J

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。* `$ E6 t: r* H/ L, i

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
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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.
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.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 M: d# w  s! L6 T3 y, s% r  v
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of
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fungus from the soil to your 7 v+ {( K: a+ _/ }% X; S
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plants.5.39.217.76  M- h: C  M0 n( Q9 L4 {8 M7 K

Stake or cage plants to keep them 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。9 m1 P, y& x, X! F: l1 H6 G3 ]5 Z/ N

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes 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。( k$ w& S( H! g- ^9 d: W2 p

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. ! U( B9 E) l: q: I1 J( e
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,bttvb3 f5 \0 {+ e0 f! ^5 z# v7 B, 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 ) K7 \- J% R4 D3 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9 t% u7 D1 _/ Q4 X' B- ?3 S
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wet. Keep your plants happy and healthy. Weak and stressed ) ^, U: o* Z4 v: y' Z: y

plants are more susceptible to disease.公仔箱論壇6 [& h% A' f2 C  ^( I% ?
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Remove and destroy or throw away diseased leaves, both off the 5.39.217.76- g2 @) |- T+ r  V0 ]; ~: D
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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 infected5.39.217.764 z# r( M$ B, o+ {
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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.
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Spray plants to prevent and control 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。4 k5 O7 l) W$ \$ ~0 I# f. r
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try

GreenCure.
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Late Blight on Tomato Plants/ R: P4 U5 g& {# F

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 公仔箱論壇' s& f- j! f" `5 ?+ B8 [

plants in a garden. Once a tomato plant 9 }5 u7 E% d6 k4 p6 H0 J

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 8 M/ k& o7 n# k+ _, X: y5 |

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 blight8 q4 y. C/ j2 w# ~/ y
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and
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Septoria leaf spot infections will also help prevent late blight infections.

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