[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 % G; ]' Q* ?4 x  x+ l9 O, w

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.) M" u$ D+ E' e: O: r
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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 tvb now,tvbnow,bttvb+ X$ p( e! D4 i& L
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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

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 tvb now,tvbnow,bttvb) Z! K+ @5 j+ `. M0 H: P

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.www2.tvboxnow.com+ V9 k" P1 L! G
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How to identify Septoria Leaf Spot" ?+ @+ W/ c0 `1 O" @  C
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Symptoms of Septoria leaf spot also start tvb now,tvbnow,bttvb, ^9 j5 D! @0 p/ b. V& N% u

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change tvb now,tvbnow,bttvb. |3 T9 S3 m% c* j9 x: x
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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. 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。& M: W, |  I: i; v
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Small dark spots, the fruiting bodies of the fungustvb now,tvbnow,bttvb: w: }5 R4 r8 c0 p5 O\" }
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, 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。: Y2 t4 j( k$ \0 \( T- |

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! O1 b6 Z\" l6 @  u4 s' U$ t
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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.( {6 n# n. V0 M+ F0 l
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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.

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 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。7 j; h8 g) g( T; e
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where tomatoes were grown.

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 " W. Y* ], i  l* h$ q, y

fungus from the soil to your
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plants.
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Stake or cage plants to keep them www2.tvboxnow.com* p4 f% x9 ]: z. n% @

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and tvb now,tvbnow,bttvb* Y% Y( R8 V) V: N  o% O
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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.
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your 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。) o# ~; M" h7 P7 N
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 www2.tvboxnow.com$ u$ n- y5 O# F8 {  a8 v7 N! L

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are www2.tvboxnow.com; V9 l1 l: y4 M2 V- V. E' |% P$ ?7 X, o
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wet. Keep your plants happy and healthy. Weak and stressed tvb now,tvbnow,bttvb: r3 [- f, o% r* x& D; [$ ^
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plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the www2.tvboxnow.com( l1 y) r  w  @4 I/ r0 R1 j' p

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% l- K: K1 I5 l( c

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 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。# T! C2 ?  g; ]  S

to remove diseased leaves should be disinfected before being used on a different plant.公仔箱論壇1 C- }7 s0 a) B$ T8 N( |- A
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Spray plants to prevent and control the www2.tvboxnow.com) `, T  F  I+ ?* L! I9 k

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 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。( Z( Y# B. _5 B3 U! s& F  C

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Late Blight on Tomato Plants公仔箱論壇7 E; J- N, H" L* j
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 2 }% d1 ?7 u# R; @: G& V% k8 H2 @

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, / g6 K/ F$ ?4 ^- {9 V" N% ^) x

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 blightwww2.tvboxnow.com; j1 e& a% [; u, u* I; _( E

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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