[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 ! Y: Z# v% Q5 X: s+ R9 C* k! x
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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

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to
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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
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in color and form concentric rings, or a tvb now,tvbnow,bttvb$ u4 y' U2 m2 h\" w5 Q& F
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 5 B4 @2 K7 T" k8 [) B* N

leaves may fall off. Extensive loss 公仔箱論壇: j9 [# r" S! O7 k. ~

of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.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 p4 U, Z7 c8 S5 ^; x1 f
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How to identify Septoria Leaf Spot

Symptoms of Septoria leaf spot also start 公仔箱論壇, t3 B" s  r) t6 c) A
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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 公仔箱論壇$ J6 ]$ a. n7 ?! t- ]
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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.

Small dark spots, the fruiting bodies of the fungustvb now,tvbnow,bttvb7 d( D1 |: N  x8 u
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 公仔箱論壇5 F6 a6 w: g- }8 A' x3 L8 I, w. ^% a
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and dead. Stems can also become infected but 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。. A; K7 z1 u* d4 q& C
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infection of fruit is rare.
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How to Prevent and Control Early Blight and
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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。$ a& l2 W5 X' |" I0 U( X; t

Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb7 g$ m& \* Q1 P% m6 R  v8 O7 i

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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Weed your garden. Some weeds, % |% O% `/ l3 Z8 W! F6 `( L
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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 公仔箱論壇$ W; T  r. P/ m1 K
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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 tvb now,tvbnow,bttvb  B  h0 t6 h" c3 P/ {, R5 E
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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.
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of

fungus from the soil to your os.tvboxnow.com9 R$ }' e1 l- p& n& j; r

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。4 [  N+ G& p# d% [1 Q2 @
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Stake or cage plants to keep them 公仔箱論壇& {' }8 k4 E) t7 @. ?; `# O
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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 公仔箱論壇0 j; R/ Y/ Z/ q: j: ^. C' l% X0 H1 m

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of 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 A" _8 _' @% p0 m
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space above the soil without any leaves. Do not use tvb now,tvbnow,bttvb& w0 R: o, g& R5 k( y
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overhead watering. 公仔箱論壇. a" N: i) Q; L+ c- \
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
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 os.tvboxnow.com$ i) |# Y8 `' p" h

wet. Keep your plants happy and healthy. Weak and stressed
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plants are more susceptible to disease.. c: k# J! O' m' l# O! Y4 s

Remove and destroy or throw away diseased leaves, both off the
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early ' n: b8 I; J( \0 N

enough. If a plant is heavily infected: h, {+ a6 y9 k/ i

, 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.' s; w, Q7 R+ Q5 n: ~( O/ q) m' u

Spray plants to prevent and control the
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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.公仔箱論壇! s: i' M/ k* O8 A7 K

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Late Blight on Tomato Plants
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 7 n( C: o( z: }* b/ t; K( S" A

plants in a garden. Once a tomato plant % N7 k; `3 L0 ^8 S7 p' ?. w
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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 blight6 b/ T- o0 r% N

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and : r/ ]6 d5 _* O8 |

Septoria leaf spot infections will also help prevent late blight infections.

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