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 - j9 k) g+ \6 e- r8 [" }
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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.& Y. Y5 ~ r' X* [. h. R
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) r) v W( p) e, F5 K: |; hHow to identify Early Blight7 y/ ]5 A, J9 C! G- q, Z3 a4 [: @
/ k% b& o0 ]6 I8 o0 `5.39.217.77:8898Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to ; Y6 P' N3 V) d$ ~* V& M4 p 5 p* i0 K7 h% ]: B/ K a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 4 ?5 k: B) J2 H0 K
M* l! J; x0 c4 O6 p: Z" aTVBNOW 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。in color and form concentric rings, or a 公仔箱論壇! @) Y4 T, P* H1 s* b
& S5 L9 ]* N, h. n* D5 B- lleaves may fall off. Extensive loss 公仔箱論壇3 F0 ]$ j- W. v6 t' A
7 S& z1 d( v/ [( ?5.39.217.77:8898of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit. * q! H& |0 F7 a* C1 x- y; ATVBNOW 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。tvb now,tvbnow,bttvb: ?, u2 D# P7 h3 B
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How to identify Septoria Leaf Spottvb now,tvbnow,bttvb$ }! m9 F9 [. Y+ [+ E
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Symptoms of Septoria leaf spot also start + c- W$ n6 q# {* F; S " u+ W' G* h' s& x( X) F8 X公仔箱論壇on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change 5.39.217.77:88982 s, k( r; H9 j' A: x2 @* s* l8 J: T
6 d4 t! Y) M: @( O5 t. D3 mtvb now,tvbnow,bttvbshape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 5 u; X! `7 Q8 k3 r7 | - W" m! l: g- q7 q: [; ]1 gtvb now,tvbnow,bttvbSmall dark spots, the fruiting bodies of the fungus. C! e2 Y4 G( c
公仔箱論壇$ S1 |\" O! P# c\" }5 U , will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 6 ]/ Y! t9 W! ^# k) J
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and dead. Stems can also become infected but ' Y+ u) X* i* |0 \ e; A公仔箱論壇/ h+ \. M2 h- z# a\" v1 `7 L+ }' C! O
infection of fruit is rare.公仔箱論壇/ u- |0 ~, E+ e: d, m5 a
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How to Prevent and Control Early Blight and 7 P) O9 W7 i. M8 E. o 2 ] `; t8 R. w) |0 TSeptoria Leaf Spot5.39.217.77:88985 a) y) S4 M1 m/ t+ D4 R1 B( ~' V' y
: j- y4 x( x8 W6 R公仔箱論壇like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants. # U% d8 `+ W$ q! O+ _6 E! l6 Y公仔箱論壇 7 Y- U) B; Z; I* C V; d% Q) u' u5.39.217.77:8898Rotate crop locations. Don’t ( N0 f" B) |' Y @ ; F4 Y C3 \& n& Utvb now,tvbnow,bttvbplant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 6 ]; x7 t) ]( M% I# J1 OTVBNOW 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。公仔箱論壇& O! Q$ S5 v% E0 X/ K! w( n4 b" i
where tomatoes were grown.& [( G$ k! n& L2 t. {
' x+ c! }+ J5 ]1 n+ c3 N4 M+ z公仔箱論壇Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇9 j: `7 |/ `1 d: R6 _$ Q* H4 }
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of % P) ~9 |5 _! M2 C
. b) P& L0 P' p, a! f2 x1 R$ i" _公仔箱論壇fungus from the soil to your 公仔箱論壇3 g* D9 j7 T7 U" h2 W$ q
, S8 I* \) J. pplants.# ~+ U1 ^! {7 d$ l5 @
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Stake or cage plants to keep them tvb now,tvbnow,bttvb( j" r( C" a! X8 t- S. [9 K @( v
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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 % v# t& V- a, R
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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 ! _! m( p5 w- s5 g * q* h9 i- s* C2 R5.39.217.77:8898space above the soil without any leaves. Do not use 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 o1 Q6 ~! s: N$ F; D' U. K8 m
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。( G9 \2 a) C! @/ {\" H
overhead watering. & F) U& ~$ z% [) w
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. % L" @2 W8 e; ~! }0 i& |6 E
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 " _7 U$ \, m& P- G9 ` }" w
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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 ` O8 Y! L; }* t+ }1 l! ?( O5.39.217.77:8898; P1 B, l1 z9 ]' }
wet. Keep your plants happy and healthy. Weak and stressed 7 r! M6 T! H' X: T7 o. \- f* ]* ^3 x% t% s* o; G T; z9 ~4 i
plants are more susceptible to disease. / G: \1 y! V4 i/ \8 otvb now,tvbnow,bttvb5.39.217.77:8898$ e; f& u! Q7 r+ _. v7 x% ^4 N
Remove and destroy or throw away diseased leaves, both off the 5.39.217.77:8898% M# G& t. y' N, x! @\" E0 b3 n0 k3 s
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plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early tvb now,tvbnow,bttvb. j9 \6 l* e8 P: y, E4 h
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enough. If a plant is heavily infected& q% g+ u, d- f2 m* L2 b
tvb now,tvbnow,bttvb f/ V# a* f) \) y3 r , the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used : a- x( o q" b+ {1 I
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to remove diseased leaves should be disinfected before being used on a different plant. - p Y F, M: w. V+ O3 b; \ . J$ T4 }6 c8 B) I, w& B; c6 e' u& OSpray plants to prevent and control the 7 K% S5 Q4 |( N. ^- w$ iTVBNOW 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。 : @) ]\" `\" y1 U3 `7 y1 D/ p/ k8 A5.39.217.77:8898spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 3 W3 d% p& e$ y1 \公仔箱論壇5 O+ ~4 t8 }) H2 F [2 d
GreenCure. ; A- b. l9 R! l$ W5.39.217.77:88985.39.217.77:8898/ u9 h) m/ u; Q( m1 F5 s
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Late Blight on Tomato Plants - K" O$ }6 w0 G$ P5 I; X, @tvb now,tvbnow,bttvb 6 X, Y6 v8 a4 ]6 P" g- VLate blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato + C8 H {5 d) L* H" q4 _' B5.39.217.77:88985.39.217.77:8898 N+ o8 L8 F8 e; L- ?" z/ Y# p plants in a garden. Once a tomato plant ' T" Q4 G# Y# O, kTVBNOW 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。 / B* g: O; o0 ?. ]" W! X! e* I+ Vis infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 0 _" U6 D! i* c/ j1 U5.39.217.77:8898$ c; P& P9 E: T* n! t7 J' o% C- Z
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 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。! p( G _ E* o, K9 ~
+ e6 k& l C; W3 g/ Y) i0 F6 oTVBNOW 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。 can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 5 r' K: N4 ], L2 H. c/ Q
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Septoria leaf spot infections will also help prevent late blight infections.
