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 % X0 t0 ], E4 x
1 O) A& z5 U% Q+ |$ p- [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。can start at any time. Infections can occur anywhere and are most severe in wet and humid areas. - N0 i o" O3 b% C& ] 2 A, D$ }3 H6 N9 D. Q/ T- d) V) V公仔箱論壇 # T# g: G+ X* A2 U- b9 Y4 k! L' \tvb now,tvbnow,bttvbHow to identify Early Blight) M+ o W, X9 _# o7 {
tvb now,tvbnow,bttvb" D) G: C; |4 Z h7 ~8 l% t6 q8 y
Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to 1 I- b& C q4 J; m' R- h" @) p; O公仔箱論壇 : U* Z6 @$ S$ T j) u% [5.39.217.77:8898newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 3 N) N7 W0 q0 }% j公仔箱論壇 3 m; M' S \2 r5 w, _9 I+ B" t5.39.217.77:8898in color and form concentric rings, or a 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。; }4 t3 d: A2 y8 @3 Q( t6 X1 m
公仔箱論壇+ k- Q+ n4 [; q+ ^( ?\" K
bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, ( S; o4 ^+ i8 k$ F
% p! |5 _7 D# f# u6 v6 Dleaves may fall off. Extensive loss 公仔箱論壇+ }- _" o8 K' a" e
公仔箱論壇7 [" P0 H- s- T7 s- [
of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.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 y* P* _% [ W+ k" U/ u4 X/ m4 P: C- e
* i' m( \6 f& n, m, @) X
8 G8 a9 W( o4 S" F; jtvb now,tvbnow,bttvbon the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change 0 p L: A) B$ k# Ltvb now,tvbnow,bttvb公仔箱論壇/ h% s) b8 u& f+ @( ]$ J
shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. % h: P) T4 l6 M, s' r: x* l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。1 v$ J2 M0 S( A
Small dark spots, the fruiting bodies of the fungus : ^8 q `9 `) @( q# ~9 y , o ]+ R2 |: ^/ n0 R! l$ a公仔箱論壇, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry + G- z: D& K; D3 u5 L& o公仔箱論壇 # k; T- N' J u* Q3 |! Vtvb now,tvbnow,bttvband dead. Stems can also become infected but 5.39.217.77:88988 H8 c1 y/ K6 a
5.39.217.77:8898& s- C* a: Z7 e v$ \
infection of fruit is rare.' \- B) G& ^. _8 }, `$ P1 X
# B9 p+ P9 I; g2 X- H
% @9 B- B# |- ?' e$ ~4 {9 xtvb now,tvbnow,bttvblike nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants. 7 k+ G( n! p# s9 F6 J4 ]3 u E公仔箱論壇; c* A0 y! F, S0 q& w* p* r4 ^+ E' W Rotate crop locations. Don’t / _1 ^9 J5 [7 J
7 R6 d+ N& j1 a; T8 Eplant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas % t, v) c' p( I/ |! U$ N, X0 T- v! r公仔箱論壇1 G) R: k9 ]: P: \
where tomatoes were grown. . n! O0 D( O L" T+ |# ~2 R0 q公仔箱論壇tvb now,tvbnow,bttvb, r- ] v( J* q5 |8 H* P5 Q
Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.公仔箱論壇3 T. r& w0 P, h& P2 h
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 1 A' K9 h7 O, } N, Mtvb now,tvbnow,bttvb公仔箱論壇2 p' \5 F! w8 ^- S0 A9 v Y+ K9 b
fungus from the soil to your * [$ c9 q5 l# P4 V; D% `" l& hTVBNOW 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。1 d6 J6 x# S, q
plants. & h' }4 `: V" o- R1 ftvb now,tvbnow,bttvb! w9 C6 M! ^7 _) M" {
Stake or cage plants to keep them 5.39.217.77:8898. P; n/ W6 }7 X2 h
: k. i1 s1 A6 L7 d( O9 Boff the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 5 a( H6 d& E% Q3 {0 j
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。' h: h* b/ c% n6 X8 a: B$ B
cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of ' E9 B2 Z& u0 Z2 o i* htvb now,tvbnow,bttvb 0 u3 ^! f6 t1 P% `/ J: }" }+ 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。space above the soil without any leaves. Do not use 4 z: L, b b, H+ {) s7 {
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。. g$ G1 o: v+ k# L/ ]
overhead 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。0 U: Z, b; h5 ?" t, f
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants. " w% t9 R; S9 S" _: v' c6 y! u5.39.217.77:8898Consider 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: X/ W5 M3 a& B
) K& V% Y9 J* ]* z! u& NTVBNOW 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。fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are % Q! }! a( n" M# C
公仔箱論壇4 [' u; k4 m8 Y1 O
wet. Keep your plants happy and healthy. Weak and stressed 6 |) \2 L( L9 T1 A/ z ( x) p8 r% H `( kplants are more susceptible to disease.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 n. {0 T6 L, h4 t: }0 r: ]
- o7 `, y& V% Z) z
Remove and destroy or throw away diseased leaves, both off the \" [3 C+ b+ Y( W t8 Y( u5.39.217.77:8898TVBNOW 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。& r1 u( K( [! s
plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 公仔箱論壇2 O7 W. c' t2 Y% n; e% ^
tvb now,tvbnow,bttvb$ n; l" w. o( I& M5 m! q. v
enough. If a plant is heavily infected + l7 V+ z% Q5 ^+ u8 M' o0 V公仔箱論壇 & ~* B6 L2 z8 A- n! c公仔箱論壇, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used j6 n7 ]: J9 K/ F! e! i% d$ C5.39.217.77:8898 5 n) e8 g* R, k/ v% U: ptvb now,tvbnow,bttvbto remove diseased leaves should be disinfected before being used on a different plant.* [4 G, ], { r* G' T% d
/ f% E, @0 z7 D* {0 S: r1 O2 A$ {公仔箱論壇Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 1 x1 s1 W4 ~3 w$ f" t1 E
5.39.217.77:88982 B0 e1 \0 t1 f/ } plants in a garden. Once a tomato plant . I4 s$ `7 }$ ~7 utvb now,tvbnow,bttvb$ @6 a# p- t2 Y0 g
is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 5.39.217.77:88988 z+ R7 i$ l. @! ]
5.39.217.77:8898' ^( o- \" _9 n% H
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 ) ^# X) w6 m! N9 X3 f8 H1 H. \1 m2 M* W0 _* x can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 公仔箱論壇 ~5 ^: r+ _+ f2 o
5.39.217.77:8898. g# N4 }! K. ?) I
Septoria leaf spot infections will also help prevent late blight infections.
