Early blight and Septoria leaf spot infections most commonly begin in the early or middle part of the growing season but 8 P4 P( l( b1 L/ F5 A# ]) Z* U
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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.
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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
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, E- L, {/ L) |: {6 Z# Y. Ttvb now,tvbnow,bttvbnewer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown 5.39.217.76# D/ D$ Z$ ^0 ~2 g0 Q' ^7 p, k
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in color and form concentric rings, or a
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, 5.39.217.76( ]1 I. ]1 ^' t& ~" Q
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leaves may fall off. Extensive loss tvb now,tvbnow,bttvb0 _6 A1 Y% G- F( h! N( J
$ V0 [, ~, M2 l6 gTVBNOW 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。of foliage is common. Infections most commonly occur on leaves but can also appear on stems and fruit.
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How to identify Septoria Leaf Spot公仔箱論壇( G2 m% w7 k4 u* Y4 b/ R
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Symptoms of Septoria leaf spot also start
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$ f) X6 s2 T% ]. D% u, _1 x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 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 j1 t0 M) c% _/ `- B8 r
) @! p) ^# Z5 e公仔箱論壇shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center.
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6 B- T! b" s5 C: @- }& jtvb now,tvbnow,bttvbSmall dark spots, the fruiting bodies of the fungus公仔箱論壇* h9 c/ d8 h3 l' Q# z# G
* m$ s R! r4 G5 {, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry 5.39.217.76+ x. g. t+ D( p. P% x, o3 }+ }
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and dead. Stems can also become infected but 7 C3 y6 L9 l: \$ M! a- z- T
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infection of fruit is rare.
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; [1 a% {) n" |9 G: o) ]4 e" ?) Q0 l0 Ztvb now,tvbnow,bttvbHow to Prevent and Control Early Blight and 0 B' L7 g) g6 E
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Septoria Leaf Spot6 F6 Y5 c1 v) I0 k) W; O
1 r2 s$ f/ q O- p9 ]6 v5.39.217.76Follow the 12 easy steps below to enjoy a tvb now,tvbnow,bttvb7 E: A) U: D% o, r6 U5 j$ [ M( E
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes., X: ?; i6 w- r+ |8 W+ ^6 B
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Weed your garden. Some weeds, 5.39.217.766 h% }3 a/ E( [2 s$ Q: _0 y/ @8 \
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like nightshade, can host early blight and Septoria leaf spot and spread them to your tomato plants.# w' x4 ]2 D9 t, L
: h& v; s5 t# o, Y公仔箱論壇Rotate crop locations. Don’t 公仔箱論壇6 M% t& ~% u; U& ~( Q l
, P3 d# z& V. v: q; O+ hplant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas 5.39.217.769 y1 W* h7 J- c: p+ m" y
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where tomatoes were grown.5.39.217.76( c2 r! E- m+ k
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.
) z$ o- Y5 R' Y# A& q/ b& hCover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of
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fungus from the soil to your
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plants.
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& k6 d1 N3 v6 n- F公仔箱論壇Stake or cage plants to keep them
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8 c( p' v- S3 Rtvb now,tvbnow,bttvboff the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and 5.39.217.76, B7 i2 Z# h3 X9 b7 r
/ }% y0 E8 P+ ^ ^( H# o. Zcages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of
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1 s; L( t- r; G Y( F2 z& F- z3 wtvb now,tvbnow,bttvbspace above the soil without any leaves. Do not use $ p3 s* i( M+ g: D( v
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overhead watering.
. r0 A1 `: M% i' D- E6 P3 E! i5.39.217.76Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
, q# R$ L% ~. V* t v6 c& kConsider 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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fungus to grow and spread. Avoid working with plants when they are wet. Fungus can be spread more easily when leaves are
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! n! A2 J, J! ?9 b2 q% Ftvb now,tvbnow,bttvbwet. Keep your plants happy and healthy. Weak and stressed
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. y N9 y- p. H) v* t公仔箱論壇plants are more susceptible to disease.
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. d. Z$ {1 `9 t; e6 y/ ?Remove and destroy or throw away diseased leaves, both off the 4 U: Y X0 e3 b$ H6 ?
# O. D0 C9 y* x0 u% Q! @1 G2 Y5.39.217.76plantsplant 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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' m: p% ]$ K, g, l* ], the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used 公仔箱論壇+ U1 K9 q9 V2 C8 a% m
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to remove diseased leaves should be disinfected before being used on a different plant.公仔箱論壇& a$ w0 i" z2 j! o
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Spray plants to prevent and control the 公仔箱論壇& h: b& ? l4 r( ]- O1 T0 V
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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.5.39.217.768 Q4 Q1 F, F; O5 H: m6 Z- ~
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+ L7 n. T9 O- n" j# V- a5.39.217.76Late Blight on Tomato Plantstvb now,tvbnow,bttvb& `2 c( \7 X8 \
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato
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plants in a garden. Once a tomato plant
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, c- }% S/ P( Nis infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small, 公仔箱論壇+ n' J& z z; e' w/ }6 ^' E }
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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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% K0 K' P5 }$ S0 [+ e公仔箱論壇 can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and
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/ p; t" G: Z) ^7 dSeptoria leaf spot infections will also help prevent late blight infections. |
發表於 2019-4-13 05:03 PM
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