Early blight and Septoria leaf spot infections most commonly begin in the early or middle part of the growing season but
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( L/ \, T" G l% b; @2 Z公仔箱論壇can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.
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+ H$ s: y( v* q" B; {How to identify Early Blight
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Symptoms of early blight typically begin on the older, lower leaves of a tomato plant. Over time, infections spread upward to * J0 C( {7 z" r* L
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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 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。) e5 w4 h! M: W6 H2 ?
# w! R- E. t6 w/ b$ Btvb now,tvbnow,bttvbin color and form concentric rings, or a
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; H6 K5 ]\" D( R, U: b( ebullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 1 |% k5 v. _3 O O
7 N! _% |/ q* _# Vtvb now,tvbnow,bttvbleaves may fall off. Extensive loss
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; ]2 F4 ], n c% u" |5.39.217.76of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.tvb now,tvbnow,bttvb; ]5 H5 _; [. M
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How to identify Septoria Leaf Spot
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Symptoms of Septoria leaf spot also start tvb now,tvbnow,bttvb5 V( a8 Z% G) p1 P! Q/ `. G, [( b
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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 公仔箱論壇2 h8 ]! Q$ V* H0 F" d8 C+ t
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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. 5.39.217.76( @4 _% P# \) p# W( S
4 Q4 b- G1 {/ e" Rtvb now,tvbnow,bttvbSmall dark spots, the fruiting bodies of the fungus
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry
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and dead. Stems can also become infected but ' h4 h$ w) } G( N+ s/ j( x3 \7 u, o
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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。. _' c0 [: i+ A
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How to Prevent and Control Early Blight and
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$ y. I# T3 P7 vSeptoria Leaf Spot公仔箱論壇# m+ T# u2 _- _1 R( m/ X) x4 ^+ A
1 m- i! Y" `9 R$ g Z$ }* VFollow the 12 easy steps below to enjoy a
: N4 I0 S; }5 a( s* w0 j0 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。公仔箱論壇- l. ]4 G9 g q* O
long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.4 g: W7 d! W# C9 T, f1 O ]
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Weed your garden. Some weeds,
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.6 X9 Y) V- ]& ^! w9 P' J1 a( v: S
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Rotate crop locations. Don’t 公仔箱論壇5 ~) p0 U) S; L/ _; E, c! m2 Y" k
) o" U( z- J& C2 Y8 u5.39.217.76plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas ) r$ B# R7 ?5 ]4 @. k
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where tomatoes were grown.公仔箱論壇* A. A. y' u3 { d4 Q) K
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.5.39.217.76$ A2 j4 l. U5 `" K' v" v/ g0 h# T
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of tvb now,tvbnow,bttvb! @. S' i' U; M! d' S5 d2 q
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$ Z9 ~# k: E6 l1 N$ m+ p
fungus from the soil to your
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plants.
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Stake or cage plants to keep them 5.39.217.76* V! D0 I, o% V. a* c; a8 B* N
5 q& m+ S0 t" @5 S5 p4 |% @off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 公仔箱論壇6 u' T* k; ?5 J6 v) I, [5 y
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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 5 I! k, i- p4 [! R
2 f9 _2 M* S( D& Pspace above the soil without any leaves. Do not use
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4 g9 u% ?1 W+ @6 Z\" n& ~- `5.39.217.76overhead watering.
! k# o) w+ Y8 }5.39.217.76Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
- f: n) {1 J9 ^1 \公仔箱論壇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
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' l# A ~* A6 [* s0 q! X公仔箱論壇fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are $ l8 n M' k [3 W) `6 r
?2 O2 `1 w( ]+ [( @公仔箱論壇wet. Keep your plants happy and healthy. Weak and stressed ' z\" @7 W; m1 K9 H _- x
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plants are more susceptible to disease.
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Remove and destroy or throw away diseased leaves, both off the
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5 ~( k6 ]5 ]5 u1 G4 K% ]公仔箱論壇plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early
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enough. If a plant is heavily infected
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, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used tvb now,tvbnow,bttvb0 s$ P2 i1 `9 v
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to remove diseased leaves should be disinfected before being used on a different plant.
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Spray plants to prevent and control the
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spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try
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GreenCure.tvb now,tvbnow,bttvb$ ^/ H |7 d; a
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Late Blight on Tomato Plants
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato 9 ^% M4 w# Z7 }) J( U
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plants in a garden. Once a tomato plant / v( t T8 r4 `9 J, C5 A' x% o
* k# ~; m) [+ Y2 V1 ?9 L# M/ v公仔箱論壇is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,
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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
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can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and
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' f( ^! {/ ^8 w" e0 C1 W8 e5.39.217.76Septoria leaf spot infections will also help prevent late blight infections. |
發表於 2019-4-13 05:03 PM
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