[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.

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How to identify Early BlightTVBNOW 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 ]4 }! S( a; ]! v) w1 R: O- q

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to : I- c7 L. T' \

newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown + D7 g6 N4 i" w4 g0 C4 ?) J( w
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in color and form concentric rings, or a

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.www1.tvboxnow.com/ |" `8 I3 {' T+ G+ }
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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。- i. `0 G  d( E

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change

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 funguswww1.tvboxnow.com/ U) o+ s5 G9 w5 n  ]
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 3 x& V$ t. D) y: a' x
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and dead. Stems can also become infected but

infection of fruit is rare.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。( L+ j7 n6 r+ T8 D4 p7 T& e

How to Prevent and Control Early Blight and - ~' W- d9 Z, H+ Z! M
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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.+ ^* Y7 r5 ?0 V* n( L  @

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

where tomatoes were grown.tvb now,tvbnow,bttvb8 r; l1 P4 Y0 N( k

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
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fungus from the soil to your

plants.
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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 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。* l1 @0 i7 p0 z1 u' S% R. @

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。- F+ U$ E. I9 C, M5 [) B/ w
space above the soil without any leaves. Do not use

overhead watering. 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 Y6 f- @" b: L
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 公仔箱論壇& J) i& v& n# G7 |$ S
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wet. Keep your plants happy and healthy. Weak and stressed www1.tvboxnow.com+ v% r9 @5 P; r2 r( ?9 ~$ d4 o

plants are more susceptible to disease.www1.tvboxnow.com; E# @8 e5 B2 G) _8 b9 e; o- p
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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 4 g  O; x/ g0 D2 L2 o

enough. If a plant is heavily infected7 F/ y\" S& O8 J& N/ z7 ?
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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 tvb now,tvbnow,bttvb$ k) W% Z& f2 i9 C; u
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to remove diseased leaves should be disinfected before being used on a different plant.公仔箱論壇' X! D, h0 e2 b
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Spray plants to prevent and control the - X0 h0 i( e& |
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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
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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 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。: p. N# G8 K, E4 z; T  i7 F- H
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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 blight* J' r4 g) H% d

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and www1.tvboxnow.com) {- o  z4 i- R; M* ?
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Septoria leaf spot infections will also help prevent late blight infections.

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