[生活小百科] 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
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can start at any time. Infections can occur anywhere and are most severe in wet and humid areas.. u2 Q4 Q( t1 s. J, w: m& ]
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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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newer growth. Early blight infections appear as spots that may start out circular or irregular in shape. Spots are dark brown

in color and form concentric rings, or a www3.tvboxnow.com0 a* v1 I) C% j( k
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, tvb now,tvbnow,bttvb7 {0 E2 s/ M) u2 D) @# a2 F

leaves may fall off. Extensive loss 公仔箱論壇- F! [* h! r% P* \8 j

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
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Symptoms of Septoria leaf spot also start 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。% D. k" m$ N! B

on the older, lower leaves of a tomato plant and spread upward to newer growth. The spots start out circular but change

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center.

Small dark spots, the fruiting bodies of the funguswww3.tvboxnow.com\" }6 }4 Y7 x8 i3 Y
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, will appear in the gray or tan centers. As infections progress, leaves can turn yellow, then brown and finally dry

and dead. Stems can also become infected but www3.tvboxnow.com# |/ u0 ^  C0 H& A+ Q. e

infection of fruit is rare.

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How to Prevent and Control Early Blight and
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Septoria Leaf Spot

Follow the 12 easy steps below to enjoy a
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.
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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.
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Rotate crop locations. Don’t tvb now,tvbnow,bttvb) B2 e3 w# l) ~& {5 n- Q. U

plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas
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where tomatoes were grown.tvb now,tvbnow,bttvb9 F) Y+ u. p( b+ H6 S9 [" L
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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

plants.

Stake or cage plants to keep them ' X: a" G; p4 `$ A3 b: F

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and www3.tvboxnow.com1 b# \$ ~* }% E

cages. Remove lower leaves for better airflow. As plants mature, remove lower leaves until there is about 8 to 10 inches of www3.tvboxnow.com5 K9 d" _* i; q% P3 d/ r3 O

space above the soil without any leaves. Do not use
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overhead watering. 公仔箱論壇4 Q3 |( l4 M  m8 M' I
Avoid getting leaves and stems wet as much as possible and avoid watering in a way that may splash soil onto your plants.
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 tvb now,tvbnow,bttvb$ G9 _" Z. G$ V1 M/ I" Q8 m2 m- f2 A
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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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wet. Keep your plants happy and healthy. Weak and stressed

plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the 公仔箱論壇# ?- Z) S) W; W5 z

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early www3.tvboxnow.com( f  ]0 I7 X: B% f$ F
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enough. If a plant is heavily infectedtvb now,tvbnow,bttvb; ^, p& T3 e2 Q6 k$ r3 I9 l
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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
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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 tvb now,tvbnow,bttvb% ~3 q9 @' ^  {
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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.www3.tvboxnow.com( W4 f6 X5 Q( w% k+ I$ `9 J
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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 + t  K# O' y; `

plants in a garden. Once a tomato plant
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is infected with late blight, the entire plant should be removed and destroyed. Late blight infections first appear as small,

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

can infect all parts of a tomato plant, including the fruit. Most of the methods for preventing early blight and tvb now,tvbnow,bttvb9 Z: z. M1 m7 ]" l

Septoria leaf spot infections will also help prevent late blight infections.

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