250 



THE GARDEN MAGAZINE 



Diseases of Orchard Trees— Continued 



May, 19 12 





PLANT 



Quinces. 

 Quince. . 

 Quince. . 

 Quince. . 



SYMPTOMS 



TTME 



CONTROL MEASURES 



Same as for fire blight of apple; see preceeding 



page. 



Spray with bordeaux 3-3-50 as for apple 



scab 



Spray early in spring before buds burst with, 



lime sulphur 1-1 2 



Destroy all neighboring juniper trees 



Blighting, wilting and blackening 

 of leaves. Tips of shoots die 



Round reddish brown spots on 

 leaves and fruit 



Fruit rotting, covered with minute 

 pimples. Cankers on limbs. . . 



Yellow spots on leaves, rusted 

 below. Fruit also with bright 

 yellow, mealy rust 



Spring and 



summer . . 

 Summer and 



autumn. . 

 Summer and 



autumn. . 

 Spring and 



summer. . 



Fire blight 

 (bacterial) 



Leaf and 

 fruit spot. 



Black-rot. . . 



Rust 



This disease very common also 



on apple and pear. 

 Spray three times during season 



Prune, clean out, disinfect and 



paint over cankers. 

 No other treatment necessary. 



Diseases of Ornamental Shrubs and Vines 



SYMPTOMS 



Yellow, somewhat swollen spots 

 on leaves with little cups on 

 under side 



Dirty white mildew on leaves, 

 with minute black dots in 

 autumn 



Circular dark spots on leaves. . . . 



Dirty gray mildew on leaves, 

 numerous minute black dots 

 in autumn 



Wilting and blackening of tips 

 of shoots and leaves. Cankers 

 on limbs or trunk 



Yellow, swollen spots on leaves. 



Rust spots on under surface of 



leaves 



Dirty gray mildew on leaves. . . 



Leaves with black spots, falling 

 prematurely 



CONTROL MEASURES 



Spray with bordeaux as soon as leaves have 

 expanded 



Apply flowers of sulphur to vine. Use hand 

 dusting machine 



Spray with bordeaux 4-4-50 beginning when 

 leaves have expanded. Gather and burn 

 leaves and fruit in autumn. 



Spray with potassium sulphide, 1 oz. to 3 gal. 

 water, or dust with sulphur, hand duster 



Prune out blighted branches 6 to 8 inches be- 

 low evidences of disease, and burn. Go 

 over trees carefully and often 



Destroy all neighboring juniper trees as fungus 

 winters on these 



Destroy all neighboring fir trees 



For greenhouse roses keep pipes painted with 

 paste made of equal parts of lime and sul- 

 phur with water 



Spray with bordeaux 5-5-50. Make first 

 application as soon as spots appear 



REMARKS 



Barberry 



Five-leaf ivy 

 (Virginia 

 creeper) 



Five-leaf ivy 



Lilac 



Hawthorn 

 Hawthorn 



Rhodo- 

 dendron 

 Rose 



Summer. . 



Summer and 

 autumn. . 



Summer and 

 autumn. . 



Summer and 

 autumn. . 



Spring and 

 summer. . 



Spring and 

 summer. . 



Late sum- 

 mer 



Summer. . .. 



Rust. 



Rose. 



Summer and 

 autumn. . 



Powdery 



mildew.. . 



Leaf-spot. . . 



Powdery 

 mildew.. . 



Fire blight 

 (bacterial) 



Rust. 

 Rust. 



Mildew. . . . 



Black leaf 

 spot 



The rust on wheat, oats, etc. is 

 another stage of this fungus. 



Spraying with potassium sul- 

 phide, 1 oz. to 3 gals, water, 

 also recommended. 



Boston ivy also attacked. 



Destroy leaves in autumn. 



Disinfect all cut surfaces with 

 corrosive sublimate sol. 1- 

 1000. Paint over with gas tar. 



No spraying treatment recom- 

 mended. Seldom destructive. 



No treatment known. 



Outside roses should be dusted 

 with sulphur or sprayed with 

 potassium sulphide 1 oz. to 3 

 gals, water. 



Repeat spraying two or three 

 times at intervals of ten days. 

 Destroy leaves in autumn. 



Diseases of the Flower Garden 



SYMPTOMS 



So little is known and literature 

 Soft rot of stem below surface 



of soil 



Plants die slowly, branch at a 



time 



Brown, powdery pustules on 



stem and leaves 



Round gray spots on stem and 



leaves 



Small round spots on leaves . . . 



Brown, rusty spots on leaves. . . 



Yellow leaves, rotted bulbs. . . . 



Red and brown swollen spots on 

 leaves and petioles 



Dead brown spots on leaves and 

 petioles 



So little is known and literature 



Unopened buds turn brown and 

 fail to open 



Rather small, dark, dead spots 

 in leaves and stems, often 

 with red border 



Large areas in leaves turn brown 

 and die 



Leaves, stem and blossom clus- 

 ters coated with white mildew, 

 later turning brown and dying. 



Plants stunted, roots abnormal 

 and pink within 



Circular spots on leaves 



CONTROL MEASURES 



Aster 



Carnation . 



Carnation . 



Carnation . 



Carnation . 



Chrysan- 

 themum. 



Chrysan- 

 themum. 



Gladiolus . 



Hollyhock 



Hollyhock 



Larkspur . 

 Peony. . . . 



Peony. 

 Peony. 



Phlox . 



Violet. 

 Violet. 



on subject so 



Spring and 



summer. . 



Summer. . .. 



During 

 growing 

 season . . . 



In green 



house. . . . 



In green- 

 house .... 



In green- 

 house. . . . 



In storage 

 most evi- 

 dent 



All season. . 



Summer and 



autumn . . 



so indefinite 



Spring 



indefinite, no 

 Stem-rot 



(Rhizoctonia) 

 Stem-rot 

 (Fusarium) 

 Rust 



recommendation is attempted. 

 In field change location of plants annually 



In bench sterilize soil 



Same as for Rhizoctonia stem-rot 



Spray with copper sulphate, 1 lb. to 20 gals. 

 water. Use resistant varieties 



Summer. . . . 



Usually af- 

 ter blos- 

 s o m i n g 

 time 



Summer and 

 fall 



In green- 

 house .... 



In green- 

 house .... 



- Leaf-spot... 

 Leaf-spot. . . 



Rust 



Bulb-rot. . . 



Rust 



Anthracnose 



no recommen 

 Botrytis 



bud rot . . 

 Leaf and 



stem spot 



Botrytis leaf 

 blight. . . . 



Mildew .... 



Root-rot . . . 

 Leaf spot . . . 



Same as for rust 



Spray with bordeaux 5-5-50 every ten days. 

 Same as for leaf spot 



Plant only healthy bulbs, practice crop rota 

 tion 



Spray with bordeaux 4-4-50 throughout sea- 

 son 



Spray as for rust 



dation is attempted. 

 Thorough spraying with bordeaux as soon as 



leaves and buds appear 



Spray with bordeaux before spots appear 



Spray thoroughly as for bud rot, repeating 

 again after blossoming 



Spray with potassium sulphide, 1 oz to 3 gals. 

 Dust with sulphur as soon as disease begins 

 to appear 



Sterilize soil or use new soil. Thoroughly 

 drain and cultivate 



Spray with ammoniacal copper carbonate 



Avoid over watering. Stir soil 



often. 

 Often serious in greenhouse. 



Take cuttings only from healthy 

 plants. 



Keep foliage free from moisture. 



Ammoniacal copper carbonate 



less effective. 

 Avoid wetting foliage when 



watering. 

 Application of lime to soil may 



prove beneficial. 



In late fall destroy all diseased 



parts 

 Plant resistant variet 



Fungous disease. 

 Fungous disease. 



Fungous disease. 



Cut and destroy diseased tops in 

 autumn. 



Maintain proper moisture con- 

 ditions. 



