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 4 ^3 k; A* n: D$ ` 4 K' {/ Y8 A$ S, U, x% n; S/ _5 n4 Ican start at any time. Infections can occur anywhere and are most severe in wet and humid areas.tvb now,tvbnow,bttvb; M% u- `) ^! V8 O
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How to identify Early Blight / c" r- f# [* k- W0 M% k公仔箱論壇 e! G. m6 c7 b( D3 c( K& ^% ~+ k$ W
Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to # [8 e; G1 [2 [" R) stvb now,tvbnow,bttvb 7 n/ `, B W# e5.39.217.77:8898newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown % A5 z) }! Z$ r7 h; ^; @4 Y: 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。 & Z, U: \( s+ g9 `tvb now,tvbnow,bttvbin color and form concentric rings, or a , F3 Q7 f' M& ?7 y1 S& X3 e2 jtvb now,tvbnow,bttvb 4 S8 w) [/ T9 L5 V* A7 B6 [ z3 tbullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, % K4 O' |) o! b: p) r1 z8 ^4 ^; ~( z+ k' R9 G3 M, [ leaves may fall off. Extensive loss 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。: L$ G1 s4 f8 V, I. ?6 @
) M) ]2 m7 r7 r; 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。of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit. , g* n) H6 G" H' k# g( M! R" fTVBNOW 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% t, `( V9 ^% n( C- {
. h) `: q' a: IHow to identify Septoria Leaf Spot$ l( M, O) S5 |; w
' c3 k. n4 h8 C6 v: MTVBNOW 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。Symptoms of Septoria leaf spot also start 4 H- B; c U3 K: R+ b+ Q" I* 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。公仔箱論壇' Z% Q' l( g( {. ?) p9 E
on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change 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。/ Q i3 s, A# i+ b- m
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shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. 4 D9 k+ e- N4 v# \* y4 a4 F) }公仔箱論壇 ( d: z5 H( ]' p3 h. l1 h+ L公仔箱論壇Small dark spots, the fruiting bodies of the fungus5.39.217.77:88982 q4 m; q8 v3 N
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。% Z3 A2 o% W* L , will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 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。( I" b4 |5 M+ K
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and dead. Stems can also become infected but 公仔箱論壇% m3 Y2 J$ ~, b7 V8 C
* a7 X- S2 Z* l# Z& D- ^long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes. + b. o: b, V4 I' m' E- u公仔箱論壇* H4 V& X7 B& e Weed your garden. Some weeds, ! V" ]2 A7 P+ f1 M7 B9 I公仔箱論壇 ) Q5 C0 o, a9 |like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants. / r' o4 Q) W% v 1 o) Q& V3 v' V0 S" v) bRotate crop locations. Don’t , c3 E |5 x1 D* }4 ~5.39.217.77:8898 * w7 h% V# F' X& D! yTVBNOW 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。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。 M- |2 P3 ~# q
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where tomatoes were grown.+ Q( I/ \& I! c0 g; i0 M$ l
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better. 2 E! n7 s+ e/ Q# i. L: \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。Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of # z- d2 t& L4 m# h0 ]! b公仔箱論壇tvb now,tvbnow,bttvb! S9 W9 E4 Q& u9 o1 [: L
fungus from the soil to your + G/ o. ^6 b# u6 `公仔箱論壇2 B2 g+ I9 n6 k r
plants.5.39.217.77:88985 Y" Z$ s/ X% M$ g6 d+ e
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Stake or cage plants to keep them - \! {3 R8 p' o公仔箱論壇5 u+ Q0 [2 T( N4 u
off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and tvb now,tvbnow,bttvb0 [9 \. k$ [! }- c# X7 F" x p# ~1 C
0 T- M T G8 u& P0 ~2 c- Tcages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of 4 w( d/ {, c# U3 n2 k6 u公仔箱論壇 8 _8 `2 `' q. R$ f4 R3 kspace above the soil without any leaves. Do not use \" u r. r\" b3 h8 x8 @5.39.217.77:8898公仔箱論壇/ Z6 i! Z' q/ U* X) O8 r/ R# j
overhead watering. ) s' A6 u; J2 i) jAvoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 公仔箱論壇8 g- h! }4 w! l
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 + {6 {" I! c! b% D' k- b5.39.217.77:8898 6 ?3 {6 B/ B' o' B- mfungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are ; J2 i M$ t4 f. g; T $ L. [0 f9 _$ r Z, o. Jwet. Keep your plants happy and healthy. Weak and stressed 8 t- y8 @& U. a& ?: p3 H1 otvb now,tvbnow,bttvb% S7 R8 z7 s2 d& U4 c6 i6 I
plants are more susceptible to disease. 3 v1 d+ F0 z% h# \5.39.217.77:8898 4 v) V! W( ^7 G; h- @6 e% 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。Remove and destroy or throw away diseased leaves, both off the 3 F+ w8 h8 [% I% H
5 C. ]0 ~/ @2 N7 X) I& E, qto remove diseased leaves should be disinfected before being used on a different plant.5.39.217.77:8898# G% z3 |* k0 Z# t5 a: y: o- X
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Spray plants to prevent and control the ! r, R& M4 c/ E: k # @/ \- `; V. R! N3 @spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try & M* {1 l4 [* F9 L# z+ V
, t, c, q3 `( v: [5 ?tvb now,tvbnow,bttvbGreenCure. 0 H6 j* k. B/ |, }& N9 @公仔箱論壇 , e, M4 l z3 Q/ ?, e5.39.217.77:8898' |: [* c) _9 i# M+ m. `
Late Blight on Tomato Plants3 t7 `, M, y& A
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 9 `( r4 @2 y# L; ~* B) ptvb now,tvbnow,bttvb" `9 j4 q' D8 H8 }+ C+ F2 L plants in a garden. Once a tomato plant tvb now,tvbnow,bttvb. T( [. z% Q. z5 R
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, - X) R8 t% j* ~0 l2 ~
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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公仔箱論壇, p6 Q2 n n3 \% j
2 a! A* {) q8 i- T w can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and # O+ O/ @9 ?# I8 ltvb now,tvbnow,bttvb2 J# c- l8 h+ S" N, a6 h
Septoria leaf spot infections will also help prevent late blight infections.
