公仔箱論壇 - Powered by Discuz! Board

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 ; j6 v' i# Y# m
$ K3 C# Q/ _% u. A( y
can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.

1 Q! d, P8 |* q
How to identify Early Blight
* K- V, _( f" i9 @
Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 公仔箱論壇9 G+ v& f. q9 H
3 |- R+ \+ U4 ~- R/ z* J
newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown tvb now,tvbnow,bttvb& Z1 M; L; j2 a" F! m$ 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。. k, q" f* w; m% w
in color and form concentric rings, or a tvb now,tvbnow,bttvb; H8 H8 I3 ]+ x- R
公仔箱論壇2 ]* e) F0 \  _; I. q- H
bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 5.39.217.77:88984 }3 U$ U+ G) f0 q

leaves may fall off. Extensive loss 公仔箱論壇7 \: T4 q: [9 l
tvb now,tvbnow,bttvb. E* t) ^; J( v% |: i$ U0 ?7 z
of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.9 j$ K2 w" C/ ^5 b+ \: G

5.39.217.77:88986 j0 h" S4 ?: v1 G6 U: {7 z4 i6 o
How to identify Septoria Leaf Spot

Symptoms of Septoria leaf spot also start

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change tvb now,tvbnow,bttvb- f1 i. m: |# y  j$ s5 ?( Q4 I4 v

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. tvb now,tvbnow,bttvb  F9 R! |' ^% A8 }  u( {# p, Y
5.39.217.77:88986 B) @! n6 O% b, D0 ]) a3 X) Y
Small dark spots, the fruiting bodies of the fungus

, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
" `4 K( Z6 X$ |! U) U2 \
and dead. Stems can also become infected but * V- p- E: a\" F& o9 K$ E8 P

infection of fruit is rare.

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。/ f6 S6 y9 o+ b* J5 X* O
How to Prevent and Control Early Blight and

Septoria Leaf Spot
tvb now,tvbnow,bttvb) k& X+ K4 T: u& n; Z7 g! F
Follow the 12 easy steps below to enjoy a

long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
, F* k$ O1 j  y5 {( J) }6 J
Weed your garden. Some weeds, 5.39.217.77:88981 [0 z+ r1 B1 Y5 P: d' o

like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.
0 B  R1 n$ h6 I8 M# T+ n( r; ~" @
Rotate crop locations. Don’t
公仔箱論壇0 P0 e. y: ~( B" A1 u. P, M
plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 公仔箱論壇- F6 \/ I1 i+ `# O5 s6 ]
公仔箱論壇( F& Q& S0 V+ O! ^5 r8 _3 o$ I& i7 N: @
where tomatoes were grown.

Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of

fungus from the soil to your 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。2 \3 j1 \! T* {2 L3 x% q7 g

plants.

Stake or cage plants to keep them tvb now,tvbnow,bttvb6 B9 ~4 a$ L2 T* L5 ?. P5 L7 t

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 9 a& A5 Z5 I4 @! X9 a

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of 1 S* b* E9 a/ `+ Q$ H

space above the soil without any leaves. Do not use

overhead watering. $ F5 K& }7 [/ Z9 P# q7 \
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. 5.39.217.77:8898, C9 `2 ?, ~+ |9 h' H' A
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 % O2 U4 ?3 N- F$ g3 A, [% k7 A  H

fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are tvb now,tvbnow,bttvb6 E' T$ k! S$ p# `) o1 x/ \: w3 |. c

wet. Keep your plants happy and healthy. Weak and stressed + i7 L3 J; j( g2 _' L0 c- }

plants are more susceptible to disease.  \0 P3 e, g, a1 J7 \' }( A4 h3 p: C

Remove and destroy or throw away diseased leaves, both off the tvb now,tvbnow,bttvb* |) H2 L4 G+ V$ C
. U7 T& F+ m3 f, R5 @6 [4 s9 H
plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 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 f. R1 I8 S. k& A) ?/ e# |  A7 @3 x
tvb now,tvbnow,bttvb/ T, t8 S0 |/ u' P
enough. If a plant is heavily infectedtvb now,tvbnow,bttvb* H4 g5 C+ c% J8 ~' l! m1 R

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used tvb now,tvbnow,bttvb$ a1 a" A) t0 g. Z. n
tvb now,tvbnow,bttvb' l; P% i! J! O( q9 H) R
to remove diseased leaves should be disinfected before being used on a different plant.tvb now,tvbnow,bttvb* \$ V" v+ b& v+ P, k

Spray plants to prevent and control the

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
tvb now,tvbnow,bttvb7 i( P. S* r" K1 z4 u: Y
GreenCure.公仔箱論壇8 i& U  v% @# ~$ `1 [  D

1 ]# ?" ?" M! X- ], L% h3 k
Late Blight on Tomato Plants+ i9 |4 b* O1 S  f

Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato

plants in a garden. Once a tomato plant 5.39.217.77:8898* s! j" V* j! L- P
tvb now,tvbnow,bttvb- u' t0 b% e% X4 I* Q. F# x
is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 公仔箱論壇% W8 ~# _; T0 ]2 h/ a

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。+ `6 c, L, ^. C7 a4 c9 W* k
公仔箱論壇/ \  v  f' {' s; B
can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and
5.39.217.77:8898/ M/ T# N1 c6 [1 U- f# _2 W
Septoria leaf spot infections will also help prevent late blight infections.

歡迎光臨公仔箱論壇 (http://5.39.217.77:8898/)