Early blight and Septoria leaf spot infections most commonly begin in the early or middle part of the growing season but # C' k5 b# D1 z( x
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can start at any time. Infections can occur anywhere and are most severe in wet and humid 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。$ v2 A' l6 i) U' e2 e
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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
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& b9 a+ Y4 u, }8 T公仔箱論壇newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown ) v( a8 W' Z/ a( L" {9 g
: v7 d: s3 |7 } kin color and form concentric rings, or a
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3 D; K8 G# g# D7 }0 }5.39.217.76bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 公仔箱論壇! N B4 ]. o5 y; r
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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.
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' y& N& P+ w( i2 G7 \公仔箱論壇How to identify Septoria Leaf Spot公仔箱論壇0 b, O* ~/ D, k! s* m
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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
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& k9 z% F9 B& W8 I8 Zshape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center.
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Small dark spots, the fruiting bodies of the fungus4 L* x! A8 r; h# X1 T
7 _4 `3 i% z% }: y. n, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
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2 H3 D8 a$ g1 i* R& z5.39.217.76and dead. Stems can also become infected but
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' X# b1 W/ C. r- x6 _- r5.39.217.76infection of fruit is rare.
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How to Prevent and Control Early Blight 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。' j1 o# @9 G+ Z+ S# M; f6 F
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Septoria Leaf Spot
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- U) ~9 Y3 h2 c5 @& ]+ h公仔箱論壇Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb) Z5 A8 j& H, d+ g# [# X\" N
8 |$ r) }( g& i6 z; m4 q& D) flong season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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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. g9 a$ g3 K8 J
& K- n: M5 W( URotate crop locations. Don’t 9 X0 W; V. E: J, A5 [# N
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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
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where tomatoes were grown.5.39.217.76" L7 }8 f; t9 y i
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
( r U/ B& l* m% Q( m, TCover 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 tvb now,tvbnow,bttvb6 @+ B7 w% a8 o! d; ]
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plants., E8 q# E* _& j E; V! f
" @ y+ w( U3 x) t$ m( d5.39.217.76Stake or cage plants to keep them
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6 d; N7 f9 e+ U5 a/ ^$ Ctvb now,tvbnow,bttvboff the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and
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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 / O% |! C7 _8 M: P+ ]- Q5 h9 p
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overhead watering. 公仔箱論壇* d; Z% y J" ^$ W3 {& n' f
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. ; q1 B. }3 X$ g! c
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9 i. C3 O y2 {# s7 p. y& O
& n! R4 B2 Z2 h公仔箱論壇wet. Keep your plants happy and healthy. Weak and stressed tvb now,tvbnow,bttvb. l& } x1 N4 x; ~! }/ V1 |' x\" C
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plants are more susceptible to disease.公仔箱論壇% S ~8 ]1 Q: `. f8 i7 R& Q y
" ?$ \3 {; X) a8 h5.39.217.76Remove and destroy or throw away diseased leaves, both off the g, R3 V+ H; t* _0 g- I
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early
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enough. If a plant is heavily infected5.39.217.76( A: K) y: }. _* g
# u9 l) e* \* V% |5.39.217.76, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 5 z- n9 q5 ~& V$ c4 n9 b
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to remove diseased leaves should be disinfected before being used on a different plant.公仔箱論壇/ o6 w4 e4 V1 a8 t5 V7 o
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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。1 I! C\" k3 }0 e/ A1 f
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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8 B- T0 S9 r; d2 BLate Blight on Tomato Plants
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\; k" S" r, X7 G6 Ytvb now,tvbnow,bttvbLate blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato
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plants in a garden. Once a tomato plant * W& x# g* N Y. K; Y
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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 blight8 ?- R6 x2 @! ~- o: m- |
. n\" _4 M. C, {- dtvb now,tvbnow,bttvb can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and * t, g8 E+ m8 @* g1 E4 j
! r) p4 i4 b, P2 atvb now,tvbnow,bttvbSeptoria leaf spot infections will also help prevent late blight infections. |
發表於 2019-4-13 05:03 PM
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