. Horticulture; a text book for high schools and normals, including plant propagation; plant breeding; gardening; orcharding; small fruit growing; forestry; beautifying home grounds; the soils and enemies involved. ong poles. Many caterpillars maythus be destroyed witha minimum of injuryto the tree. Another remedy is ~*^£t> ***$kZ >*. $**H&-^ ^° sPray the tree all «&2~* over with arsenical poison, such as arsen-ate of lead. This willpoison the larva? whenthey are seeking theirfood. Apple Scab.âProb-ably the worst diseaseof the apple is applescab. This fungousgrowth attacks theleaves,
. Horticulture; a text book for high schools and normals, including plant propagation; plant breeding; gardening; orcharding; small fruit growing; forestry; beautifying home grounds; the soils and enemies involved. ong poles. Many caterpillars maythus be destroyed witha minimum of injuryto the tree. Another remedy is ~*^£t> ***$kZ >*. $**H&-^ ^° sPray the tree all «&2~* over with arsenical poison, such as arsen-ate of lead. This willpoison the larva? whenthey are seeking theirfood. Apple Scab.âProb-ably the worst diseaseof the apple is applescab. This fungousgrowth attacks theleaves, small twigs andthe young fruits them-selves (). Thescabby appearanceformed on the fruit:%** -.; | t. I gives origin to the * ^r:-\ .--4 \4&*â â ! name. The disease lives in the form ofspores on the trees andin the rubbish underthe trees from one sea-son to another. Remedies.âThe winter spraying for San Jose* scale describedunder the head of peach growing in the next chapter will destroymany of the winter spores of the scab disease. The orchard should again be sprayed with lime-sulfur or Bor-deaux mixture about the time when the buds are opening andbefore the blossoms are Fig. 123.âNetting around the base of tree to protectfrom mice, rabbits, etc. (Indiana Station.) BITTER ROT 199 Twig Blight.âPears, apples and quinces are subject to attacksof a bacterial disease known as twig blight. Small twigs of treesare seen to turn brown after the leaves have formed. This mayprove very serious, as the attacks may extend into the largerbranches and destroy nearly all the new growth each season. Nosatisfactory remedy for this disease has yet been found. Sprayingwith Bordeaux mixture for the control of scab and other diseaseswill doubtless aid somewhat in the control of twig blight. Severe pruning is considered the most satisfactory pruning instruments should be disinfected after every cut bydipping in an antiseptic solution, such as copper sulfate, o
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