[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 * X/ l* G1 C$ g- w, o' a

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, V5 S/ d: T/ G) C7 ?
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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 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。& `/ U, r$ x; _; u2 F  E9 h6 `

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。0 |, ^. c3 g* E+ a& z; b% A
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in color and form concentric rings, or a www1.tvboxnow.com% V( ]3 L% a: r: L
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 0 j* R2 j) p  b4 [3 m" L

leaves may fall off. Extensive loss tvb now,tvbnow,bttvb3 R& S7 I7 i" U0 q; t

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 Spotwww1.tvboxnow.com' \5 L0 S/ ~3 ?) y) M: v
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Symptoms of Septoria leaf spot also start 公仔箱論壇* W# Q& F: ]5 F9 R6 n
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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.   w9 W% M- q  `1 u9 V9 g! ~

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 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。* E4 n* p, K, X  K' M  ^( s8 G

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

Follow the 12 easy steps below to enjoy a

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。% ^: }; H4 G  A, J0 h
Weed your garden. Some weeds,

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.tvb now,tvbnow,bttvb9 P5 M4 Q/ w% S# O& g# n
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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 + j. |3 h, Q- u2 M1 n6 `9 S
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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.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。: ^( O2 b0 p. g/ n5 ^. ]/ n
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of tvb now,tvbnow,bttvb+ o1 N8 r9 _0 T1 n8 T

fungus from the soil to your 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。& J2 ]: {6 l) t( C! }3 e( ^

plants., A8 c1 u# Q8 x: o0 e  ?
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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 tvb now,tvbnow,bttvb5 D6 R  V* k9 k1 S
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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. tvb now,tvbnow,bttvb- F6 ^' ?1 u! \; j
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。0 T) E* i/ W5 a; ^7 F
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 www1.tvboxnow.com+ \$ p- M4 P7 l, F4 q7 u
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wet. Keep your plants happy and healthy. Weak and stressed ( {# x6 t0 o' S- c  Z9 \
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plants are more susceptible to disease.3 P% c- E3 o; @' [* B

Remove and destroy or throw away diseased leaves, both off the www1.tvboxnow.com$ t# \3 `8 q! Q\" c# P1 C

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1 K6 u\" c7 \3 c

, 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.  {( h5 u* {5 L; J
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Spray plants to prevent and control the tvb now,tvbnow,bttvb& ~* v5 Y: [1 k. q. m, }
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try

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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

plants in a garden. Once a tomato plant 8 ?% y) G: f" ?

is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 公仔箱論壇) H9 _9 T: [' Y+ \. K- v0 E! r: @
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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 blight

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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