[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.
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How to identify Early Blight, X" B0 R, m9 a. ?$ Z: \

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 公仔箱論壇8 n+ k& l% o3 S+ u3 F6 n9 c
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bullseye pattern, as they grow. The area around the infection commonly turns yellow. As infections grow, ; M: }5 _* B) u5 l/ @

leaves may fall off. Extensive loss

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

Symptoms of Septoria leaf spot also start

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。, c* g" b# G$ [+ U/ h

shape as they grow and can merge with other spots. Spots typically have a dark brown edge with a lighter gray or tan center. tvb now,tvbnow,bttvb- d; W( \$ i' ~) s! ]7 t% Z. P

Small 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 www1.tvboxnow.com4 X9 m2 d2 u4 P" h7 |/ q: o8 p
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and dead. Stems can also become infected but tvb now,tvbnow,bttvb6 N+ m9 Z5 N# s0 L* n8 Z# Q

infection of fruit is rare.www1.tvboxnow.com9 b& v6 _* o& W1 Z
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How to Prevent and Control Early Blight and
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Septoria Leaf Spot
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Follow the 12 easy steps below to enjoy a 公仔箱論壇7 y\" K9 f1 t# U+ e/ k
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long season of sweet cherry tomatoes, colorful heirloom tomatoes and richly flavored sauce tomatoes.! h+ h1 U7 w2 ]5 `# U0 m, ^
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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.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。$ Y. `; H- s4 B
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Rotate crop locations. Don’t
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plant your tomatoes in the same place each year. Early blight and Septoria leaf spot can persist for multiple years in areas

where tomatoes were grown.
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Give your tomato plants more space for better airflow. At least 2 feet of spacing, more is better.www1.tvboxnow.com; l9 l; v/ M% b0 v/ X- V% U, V
Cover the ground beneath your tomato plants with mulch, plastic or landscape fabric. A cover helps prevent the spread of 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。/ Y. x% H& |* b9 f- e
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fungus from the soil to your , B$ r7 I5 j8 ^- \9 v* R% W# }
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plants.
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Stake or cage plants to keep them www1.tvboxnow.com# Y% V( b2 a& f$ U: O4 V

off the ground. Early blight and Septoria leaf spot can survive on stakes and cages. Use only new or disinfected stakes and
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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 : N0 h0 B. n7 }, `8 I2 ?. _) a8 g
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space above the soil without any leaves. Do not use
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overhead watering. ' O1 C0 H7 w: Y7 C
Avoid 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2 @0 \; q! l2 a" V
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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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 www1.tvboxnow.com; ?# c  _( v& }& |, l+ T

plants are more susceptible to disease.

Remove and destroy or throw away diseased leaves, both off the www1.tvboxnow.com3 p% `3 @  {, A0 q/ ?

plantsplant and any that have fallen onto the ground. This may help stop the spread if caught early , M" X( V7 N/ C0 R( C& P* d0 S% M
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enough. If a plant is heavily infectedtvb now,tvbnow,bttvb, c; e1 R+ v$ K% d

, the entire plant should be removed and destroyed. Do not put infected leaves or plants in a compost pile. Tools used

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 www1.tvboxnow.com5 q' R( ~- J\" y6 Y' a$ n$ s

spread of Early blight and Septoria leaf spot. Commercial fungicides are available. For organic gardens, try 7 f: m" p& o) Q- D) @/ u/ l3 X
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GreenCure.www1.tvboxnow.com" F, ?0 x+ B# r4 M( D: T* t( S

Late Blight on Tomato Plants1 f# X0 B1 j9 ]% E) U. \
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Late blight is another fungus that infects tomato plants. It spreads fast and can quickly kill all tomato

plants in a garden. Once a tomato plant

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

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