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標題: [生活小百科] Early Blight and Septoria Leaf Spot on Tomato Plants [打印本頁]

作者: 6t6t 時間: 2019-4-13 05:03 PM 標題: 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7 r) e) C# S2 N; S- ~/ S
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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 公仔箱論壇( Z* P: M% u: r8 F
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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 9 K& }% _1 q, o! o9 \7 x
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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, 公仔箱論壇5 U/ K2 G5 X& J$ `

leaves may fall off. Extensive loss
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of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.

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 公仔箱論壇' a% B" @" n5 M$ F; w# s

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 公仔箱論壇) a3 R) {) x# n' Z  |( e

Small dark spots, the fruiting bodies of the fungus$ L$ b' c) ~; n5 P# L\" g% f
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry

and dead. Stems can also become infected but - q( a- o2 D! E
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infection of fruit is rare.公仔箱論壇4 i  E3 p; W2 T+ l7 D
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How to Prevent and Control Early Blight and
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Septoria Leaf Spot" C8 ^- ?% }" D6 E, F" Z1 }1 Y4 x
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Follow the 12 easy steps below to enjoy a 1 w: H: P* R5 s1 G

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.# o+ w& D) \: m0 X! \! {" B

Weed your garden. Some weeds,

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato 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。3 _5 Y$ q, R# W

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 ) \9 s  w/ x; B5 @
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where tomatoes were grown.tvb now,tvbnow,bttvb& {" I  z4 B; l! v) D0 l
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.5.39.217.77:8898  D* t7 p2 B! V% e0 T- L( S) a# m
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 5.39.217.77:88989 p3 ^1 t/ y# z  [1 z

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 , F% I& Y2 a4 F0 P
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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 5.39.217.77:8898) z3 i4 ]4 G! a2 v: ^

space above the soil without any leaves. Do not use tvb now,tvbnow,bttvb1 C* \4 ?% ], k, F1 v

overhead watering. 5.39.217.77:88985 J6 @( V, p; [7 k- k
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,bttvb) m* ^/ P2 B* p
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
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wet. Keep your plants happy and healthy. Weak and stressed ' q$ V5 V9 ^! b5 |; F
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plants are more susceptible to disease.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 x  i3 H7 W, |" c

Remove and destroy or throw away diseased leaves, both off the tvb now,tvbnow,bttvb, t4 C\" z' Z/ t1 C* p5 k: T

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early tvb now,tvbnow,bttvb0 l0 U) a) ~6 y+ D
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enough. If a plant is heavily infected

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 5.39.217.77:8898: B2 v0 F7 |+ K: i; V

to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb; W* E: K) T; q% v: K
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Spray plants to prevent and control the 公仔箱論壇# ^+ ~2 M) \) ?* w9 ?, l& |' T
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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 Plantstvb now,tvbnow,bttvb8 D; \2 x  R+ ]# [( i2 q! m& k) \9 V% ^

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 公仔箱論壇% k. a5 Q0 C2 x

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。9 |; }3 l) j" ]0 w, D
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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
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and - P% z, b! w( g& b& ?* l

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

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