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 0 @( I a# J9 Z- U, U5 F5 U# F & j/ w- {6 Y d/ ios.tvboxnow.comcan start at any time. Infections can occur anywhere and are most severe in wet and humid areas.tvb now,tvbnow,bttvb* S- i j: V( d6 A; h
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How to identify Early Blight {* l% ^% u' e7 b" e7 @& Los.tvboxnow.com % _: w& g7 K& Q3 N# H6 h k" b; w1 y7 }tvb 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$ _/ z+ z( N7 T0 @7 Z; T
" T& O4 W- f0 n1 `& W8 Lnewer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown tvb now,tvbnow,bttvb$ ^, ^# x% P+ s3 d& I, F
9 F" r E; O, ?1 u& y$ ~" ios.tvboxnow.comin color and form concentric rings, or a 2 D6 R& M/ Y+ P$ S- m h
/ I6 A4 c7 X% }: `tvb now,tvbnow,bttvbbullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 9 b8 J/ c7 V! g8 P1 A6 b% x$ W' Xtvb now,tvbnow,bttvb* p9 C6 E3 E; T! d& P leaves may fall off. Extensive loss 6 I, @* P, ]4 {4 X8 D6 T# Ztvb now,tvbnow,bttvb 0 w3 T& Q& \/ q) ^, ^- ^ _of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit. ' v2 B5 K% P! U! d( Z$ _os.tvboxnow.com公仔箱論壇7 U4 S% V/ m/ E+ t; N
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How to identify Septoria Leaf Spot 9 `* X3 H& M: A; K( {5 ], p5 @* j; |$ e4 ~$ e
Symptoms of Septoria leaf spot also start 公仔箱論壇7 ^$ ?9 W2 j- L
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on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change os.tvboxnow.com, ^5 I, w4 a# u' n- p0 K1 H/ X/ i
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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. Q5 o& u. e; ?os.tvboxnow.com 2 R4 _* Y' N0 m7 A e/ ASmall dark spots, the fruiting bodies of the fungustvb now,tvbnow,bttvb* T1 t\" q4 }+ V) y0 d5 {, H) T+ ~# z
tvb now,tvbnow,bttvb$ B% ^8 N' o: s7 _ , will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry tvb now,tvbnow,bttvb6 f( n5 j( |, O' D& O
7 K K9 s( `/ \( y; h' Cand dead. Stems can also become infected but 2 Q, r\" n s/ u' m
3 p9 p: [% v: v$ F7 K$ Q" ^' e! W公仔箱論壇like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants. % m" y2 p' @, X# r% R7 v; O$ otvb now,tvbnow,bttvb1 F8 C& |4 t: x# H& ^& X, \ Rotate crop locations. Don’t * L8 M7 u$ b& l. Q公仔箱論壇 0 J! G5 f5 O/ o2 F$ v! {! ~os.tvboxnow.complant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas os.tvboxnow.com% ?! Z. f0 P9 i
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where tomatoes were grown.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 R d" |9 Y/ i+ ^! {/ Z
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。" `. K8 q2 _" d$ i
Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.os.tvboxnow.com7 T& s$ j6 S7 O9 C! V1 i u3 O1 w
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of % o, o6 a- c7 S% Uos.tvboxnow.com公仔箱論壇+ l/ _- O+ w! h1 b
fungus from the soil to your + Q: t. q- O U+ z2 \+ {' G% r公仔箱論壇 0 \% R( x9 n4 h- jos.tvboxnow.complants.tvb now,tvbnow,bttvb% c- S5 Y$ W Z" K0 w; w
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Stake or cage plants to keep them # g( B. Z, L* F+ L
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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 4 a+ U5 Y( s: y* q
* a+ P- z$ f9 o5 Jcages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of tvb now,tvbnow,bttvb5 L" c1 N. @* B( @1 b
' h& Z U1 G9 H Q8 w公仔箱論壇space above the soil without any leaves. Do not use 公仔箱論壇+ X+ M& A# h8 g! y
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overhead watering. % J7 l1 C$ X5 |) a& ?8 ktvb now,tvbnow,bttvbAvoid 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5 R. A" D2 F- J0 i0 H1 f
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 2 |9 ^. P7 R2 q+ I/ e+ l K公仔箱論壇 4 p. n2 x; G" A) X& gfungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are tvb now,tvbnow,bttvb% w2 b# I. r2 _8 B+ k
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wet. Keep your plants happy and healthy. Weak and stressed b2 Q. a6 }$ B, O! K& U 6 P% d\" f# E) B) O, T. N. `公仔箱論壇plants are more susceptible to disease.公仔箱論壇8 ~% H/ a9 `* ^4 b( a; M
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Remove and destroy or throw away diseased leaves, both off the $ A! i- J4 }1 y6 ?7 X! M4 P9 u \" U }9 y ^0 E* m. S7 `os.tvboxnow.complantsplant and any that have fallen onto the ground. This may help stop the spread if caught early 8 [% t' B! h6 J! r0 D) d & T9 @* b; N! V# G+ o6 |, ]enough. If a plant is heavily infected ' @( h( T7 g8 @* g& y `! P & Y\" \2 J4 t4 z' q8 A) t, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used ) n( c! B) r! C) vTVBNOW 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" @7 S4 S* B, Z8 I3 M: L
to remove diseased leaves should be disinfected before being used on a different plant. 1 w5 N, s, ^, K2 Qtvb now,tvbnow,bttvbTVBNOW 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。9 X1 C+ Q/ l3 b4 [3 U4 _2 A
Spray plants to prevent and control the % ?& D2 b( U8 U, X; ETVBNOW 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3 N: R( Y, }( `( G+ C0 T
spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 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。9 P4 V- t* k! O7 B, ]* r
0 W' ^6 \ k3 g( t4 A' U" LTVBNOW 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。GreenCure.os.tvboxnow.com; E0 X5 S* o @/ z
/ ?: [7 l1 Z* J0 ~$ 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。 7 z5 }4 r6 O: @! CLate Blight on Tomato Plantstvb now,tvbnow,bttvb4 `; E0 r) F' R9 i
3 {# O& s' h* gLate blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato , k X1 g @+ p; }/ j8 G% e 2 l5 l4 W0 Q8 O$ {/ u+ \" tplants in a garden. Once a tomato plant * `6 U$ k2 K' Y$ i1 n公仔箱論壇 . d1 J3 \; E4 T: Y' A! b+ Y1 L9 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。is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, : Z. x0 c6 j; c6 l' kos.tvboxnow.comtvb now,tvbnow,bttvb0 q- Z; l+ q- w: d9 P
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 ) i$ [2 I! ^1 B8 I8 Q' l u4 P2 O\" k公仔箱論壇 % N+ S: } G# a, r: o/ N; ~os.tvboxnow.com can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and 7 F5 i/ T6 \3 m: Ios.tvboxnow.com ' t8 H* p; v1 S6 [7 xtvb now,tvbnow,bttvbSeptoria leaf spot infections will also help prevent late blight infections.
