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 tvb now,tvbnow,bttvb! d) ]& U( p( V
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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas. 6 u$ H: f9 @& c" C. i" C1 d( w公仔箱論壇 , K$ E( K8 R% K- ^. Ntvb now,tvbnow,bttvb 2 w; g" @1 [5 |How to identify Early Blight d [1 W0 U! ?* b. K: q
8 Z3 @9 V( s+ n( I/ m2 ?" htvb now,tvbnow,bttvbSymptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to tvb now,tvbnow,bttvb& x7 h, x9 S, j+ y" A3 x: u. r
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newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown " d- d6 ~; }1 Y$ P* V* L( @公仔箱論壇5 E B1 k2 v$ ~/ D% b
in color and form concentric rings, or a 5.39.217.77:8898- _; Z3 Q& E' ~ U& }
5 b3 G: l5 v6 H3 D( dtvb now,tvbnow,bttvbbullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, $ o4 f" Q" `& l& T1 ]) r4 }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。tvb now,tvbnow,bttvb D1 j' ^: z8 R! O _ 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。8 W9 l, p7 _- {* @7 d
7 E+ V. n# d6 _+ `5 x+ }) q$ f公仔箱論壇of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit. : Z$ A/ H! r* F! k8 S5.39.217.77:8898 6 c$ r( Q0 _0 g# B) Z% j6 r# r6 G& R2 V4 }5.39.217.77:8898 $ Z/ X: J+ V' A6 Y9 J) J5 O 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。How to identify Septoria Leaf Spot + b z& G9 d5 Q6 Y2 U& d1 ?* b' f6 f& s9 X3 k
Symptoms of Septoria leaf spot also start $ A5 @0 [; U# X& E5.39.217.77:8898 0 R" G- o( P) }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 8 L3 x/ Y' Z; ]3 u* ^) E
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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. 3 B4 X1 l3 [2 d# n# b5 ltvb now,tvbnow,bttvb公仔箱論壇+ M% e" A/ K T: O5 {- ]
Small dark spots, the fruiting bodies of the fungustvb now,tvbnow,bttvb& m5 U/ Q0 }* M4 t
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。- w( t I3 ^0 s6 e& X1 n , will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry * _2 G5 q s4 w; D% Q9 w公仔箱論壇9 Y3 `" g' `8 ^9 w3 u# k2 [7 B
and dead. Stems can also become infected but ; l7 r3 ~- ~' b! X 3 n, A# P5 h3 ?% n+ E7 h# M/ Linfection of fruit is rare. % N C a# n' j |6 H/ z% i& T- i* ~' [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。* R$ I/ g+ n& V0 G. _* b6 q; r2 ^
: M7 a" L% A" A; i8 j' ~tvb now,tvbnow,bttvbplant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 5.39.217.77:8898) K) {# I4 B) v0 V6 }/ [1 A
% V. k/ `" B: ^% i' G+ L- ~9 G6 h+ I公仔箱論壇where tomatoes were grown. * y K- V* R8 f- G! H$ o7 m, X: u5.39.217.77:8898公仔箱論壇1 V$ Q) C) w- A3 u4 g
Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better. / N6 h, u* k4 H8 d2 [, ^* V' z5.39.217.77:8898Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 5 B# U$ a- ]$ V# o( i6 X5.39.217.77:8898 + o( W: i* C$ ?7 ^; Z4 J1 b5.39.217.77:8898fungus from the soil to your 公仔箱論壇+ y$ \& h! Y/ c ~. k
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plants. 9 C5 g. n- S7 w& Y - X# c: |. F6 W1 _% L5.39.217.77:8898Stake or cage plants to keep them 1 K/ I. u* P8 ctvb now,tvbnow,bttvb公仔箱論壇0 Q, M# B* D- Z6 `0 c6 k- J4 [
off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and - m: k0 x. L) v
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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 公仔箱論壇# B' ?9 b4 f. u6 }+ z; E' D; c2 v
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space above the soil without any leaves. Do not use : S8 X& m- O$ h8 j+ b6 x/ F+ \\" c公仔箱論壇 ( U R7 j* t/ P\" g4 hoverhead watering. 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。( N( M; X, U3 _; j3 z# K5 F
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 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。! B7 q4 v; L4 Q1 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 tvb now,tvbnow,bttvb' e. E8 [9 `. n B% q5 m, t; H" g5 a
$ @" m4 j# R- _: ^5.39.217.77:8898fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are 0 D% o5 e2 O# Z1 x( Z" c3 x5.39.217.77:8898tvb now,tvbnow,bttvb( ]3 R/ M. Z" G0 @3 G
wet. Keep your plants happy and healthy. Weak and stressed % S8 A6 Y- \: O) C% f+ f d$ a公仔箱論壇 - v, n# m. B, _2 V! K2 U5.39.217.77:8898plants are more susceptible to disease.tvb now,tvbnow,bttvb, A& L& e# \1 x: S& L V# P, t) l
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Remove and destroy or throw away diseased leaves, both off the # r8 n5 O4 g2 ytvb now,tvbnow,bttvb \" G. y& p: t/ b, Z2 j0 |plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early - T; r4 O& U2 k* R, J% I$ T: b
3 }$ s$ m+ S! t; i/ Itvb now,tvbnow,bttvbto remove diseased leaves should be disinfected before being used on a different plant.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。+ ~5 P9 U9 U, L+ }/ w4 W; ~ A
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Late Blight on Tomato Plants ' W4 n& H4 E, m. j- `9 i8 x: }tvb now,tvbnow,bttvb % x4 H% b o4 k; D8 K5.39.217.77:8898Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 8 w& ?' _ e3 Q& q2 ]2 q4 G7 [% l" C) T, K plants in a garden. Once a tomato plant 3 v, L& D0 S8 o2 o4 F公仔箱論壇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。$ c, j2 n$ g: w' \4 Z. B, h
is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 5.39.217.77:8898" N. l$ P, p i! ]) R
/ q6 y* c' `5 h. y8 J9 T. Y7 Gtvb now,tvbnow,bttvbwater-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 blighttvb now,tvbnow,bttvb' R# W' L\" R* g
7 S' M9 Z8 ^$ I; r5.39.217.77:8898 can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and ' d+ a) s+ @7 A# \+ `# O) b7 x4 _
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Septoria leaf spot infections will also help prevent late blight infections.
