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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 / |' L6 Q. |0 y6 d4 k( ~2 n

can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.tvb now,tvbnow,bttvb  f- }0 j1 g" w* ^# d2 ?/ s' ?" B+ F* j

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How to identify Early Blight5.39.217.77:8898+ X0 j' y0 L! A0 W3 R- c1 ?+ _

Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to ' R& }. R6 X; M

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。, ?9 F9 }, D& x9 K

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.

How to identify Septoria Leaf Spot
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Symptoms of Septoria leaf spot also start

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. 5.39.217.77:8898& x! o: x$ s# `$ U4 W! h0 P
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Small dark spots, the fruiting bodies of the fungustvb now,tvbnow,bttvb$ {( @# `2 D% P, Y8 H  M( F

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
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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 ) N7 Z3 D4 S3 k

Septoria Leaf Spottvb now,tvbnow,bttvb7 v5 K' l# P0 g6 \9 @% G) _
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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.
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Weed your garden. Some weeds, : O, g$ C+ C7 ]

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.$ i9 a( Q, \, B, w; ?
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Rotate crop locations. Don’t tvb now,tvbnow,bttvb& a: u3 J) k4 C- U& |1 m3 ]. b

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。) ^; {3 U3 s! s0 ^# X

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 5.39.217.77:88982 K3 Q9 ?% v9 V& N' Q: e% z, D+ M
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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。6 \) `4 K* I( O8 R1 j4 _& {

plants.

Stake or cage plants to keep them tvb now,tvbnow,bttvb/ J) _$ R2 [/ r: }2 C: c0 X
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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 % X. Q' D- ?; t/ |

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。$ _" E" G/ N- m: A0 |' s' T
space above the soil without any leaves. Do not use

overhead watering. / i2 d& L: B& F8 R# H
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 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 y/ d4 \9 T* U8 ?

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

plants are more susceptible to disease.
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Remove and destroy or throw away diseased leaves, both off the ; t6 k0 p# j, D# v8 S; e% U
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 7 O( y5 P! ]& ~
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enough. If a plant is heavily infected
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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 5.39.217.77:8898" I) n8 {: n: s$ A, o
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to remove diseased leaves should be disinfected before being used on a different plant.

Spray plants to prevent and control the 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。/ o3 H0 [& Z- e& N  W' k
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try

GreenCure.

Late Blight on Tomato Plants公仔箱論壇: G" b, i! J. J) u7 k

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
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, tvb now,tvbnow,bttvb: C& U% t8 Z* V3 ^' s" d9 e0 u
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 ?9 s2 b4 c1 u8 \! r7 W3 ~
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 5.39.217.77:8898# M9 e& J! J1 a

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

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