Early blight and Septoria leaf spot infections most commonly begin in the early or middle part of the growing season but 5.39.217.77; I6 t& n! u3 a: K
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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
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, o0 x% f' l. d, Z% W' m* G公仔箱論壇Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to tvb now,tvbnow,bttvb0 ^: e3 Y) { x1 j0 G5 i/ Z
4 G- k( f0 ?' \# B; y5.39.217.77newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown
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1 v7 Z1 ^. ]' f8 Pin color and form concentric rings, or a
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 公仔箱論壇- i; a+ R n" D5 ]" w1 X
. b" v i5 w5 @5.39.217.77leaves may fall off. Extensive loss 公仔箱論壇6 o: F% w2 B+ F. [. J. j
2 K& _, l2 J4 }# N! ]5.39.217.77of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.
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3 C. T5 r' z- G6 |. A0 gTVBNOW 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。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. w! L! G. i' m5 w
, _7 |. Q% R X" [" G# jTVBNOW 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。shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. - I6 q7 E( o! l% n6 {
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Small dark spots, the fruiting bodies of the fungus
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, 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 - C4 g9 D8 J/ X& x5 @
- o; v/ E, p, W. {/ P( a5.39.217.77infection of fruit is rare.tvb now,tvbnow,bttvb5 U$ c7 `# O% v4 Y5 |' O: n
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How to Prevent and Control Early Blight and
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Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.5.39.217.77- G. a; c( y* P. x# _; A
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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.tvb now,tvbnow,bttvb! A2 ]- ~9 y% s4 P: z& \
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Rotate crop locations. Don’t * K# C4 [/ M' O8 g9 _4 G
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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.
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.2 `. @2 H; P3 P$ n* C1 L
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of % }5 R1 X: n) g% d0 T5 p
- e& D3 q5 f7 R& Xfungus from the soil to your
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plants.9 F& c7 x+ S, v1 K8 o; [
" M5 K8 b9 P, H! C+ s) o" z5.39.217.77Stake or cage plants to keep them 2 m5 H7 o4 b3 G4 {6 H/ ~2 o: L
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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 m( w. y0 h$ V x
: b: s9 ?0 s0 y" n0 Ytvb now,tvbnow,bttvbcages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of 1 r5 C- [ Q- J% M; }
& D: s8 E, x. L3 wtvb now,tvbnow,bttvbspace above the soil without any leaves. Do not use
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overhead watering. 公仔箱論壇+ ^% a% u" [7 t1 s* Y
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 5.39.217.772 Y. t7 ^. {1 V. t6 B
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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0 @) p% `9 t; ?/ r5.39.217.77fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are S6 \8 C1 c8 Z( D
! Y v" @# W7 S& U7 V公仔箱論壇wet. Keep your plants happy and healthy. Weak and stressed / w0 }8 Y9 Y2 L% t' V
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plants are more susceptible to disease.公仔箱論壇, b6 U- k: j$ n; t
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Remove and destroy or throw away diseased leaves, both off the \" g$ T: W# g2 M
5 W. |* i3 \/ h8 t) u: u2 Y5.39.217.77plantsplant 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 infected
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$ U# R& z7 A: d, }, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used
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) U& @ R$ s# X) e$ ~* t4 b7 E公仔箱論壇to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb7 p3 ?/ |. j9 ~
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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.
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Late Blight on Tomato Plants
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' z. D: N' O2 v8 c0 @+ I5.39.217.77Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 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 o0 P0 w) R: k# f0 R q' x4 Y
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plants in a garden. Once a tomato plant 5.39.217.77; ]* R$ i. A$ L
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, ; D2 w0 E ~- x' G0 f7 H! d; C
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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 blight
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3 \& `7 [3 n1 ]* ?6 t' J3 `. k$ a公仔箱論壇 can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and $ {% v# u& r2 J+ c: M' ^: N
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Septoria leaf spot infections will also help prevent late blight infections. |
發表於 2019-4-13 05:03 PM
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