316 



GARDEN GUIDE 



EGG PLANT 



Leaf spot (Phomopsis texanS). Large » 

 irregular patches, gray or brown in color, 

 on which small black pimples subsequently 

 form, are produced upon the leaves. Simi- 

 larly appearing sunken spots or cankers are 

 produced upon fruit and stalks. Plant only 

 disease-free seed or treat seed with corro- 

 sive sublimate (1 to 1,000) for 10 minute?. 

 Wash in running water 15 minutes and plant 

 at once. Do not plant on land which grew 

 diseased Egg plants last seasoo 



GOOSEBERFTY 



AnthraCopse. See Currant. 



Leaf spot) See Currant. 



Powdery mildew (Sphaerotheca Mors- 

 uvae). This disease may be recognized by 

 the powdery white patches occurring on 

 leaves, stems and fruit. These patches 

 finally turn brown as they run together 

 Sometimes diseased berries are deformed 

 and may crack open Spray with lime 

 sulfur (1-40) when th buds open and later 

 at intervals of 10 days until foiU" or xnore 

 spra,yinga have been mjide. 



GRAPE 



Anthracnose ((jloeosporium ampelv- 

 phagum). Small spots with raised ^borders 

 and depressed centers are formed on the 

 shoots and tendrils. These enlarge in the 

 long direction of the shoots and later the 

 center becomes more depressed ana grayish . 

 On the berries small dark brown spots with 

 red border appear; as they enlarge thej» 

 become depressed, but remain circular. 

 Cut out and burn diseased wood. Spray 

 dormant vines with lime-sulfur (1-9). 

 Spray the vines with Bordeaux mixture 

 (5-5-50) first, when the shoots are about 12 

 inches long, second, just before the flower 

 Jauds open, and third, just after the blos- 

 soms fall. Follow with two more sprayings 

 about 10 days apart. 



Black rot (Guignardia Bidwellii) shows 

 c~i uerries at first as small blanched ; reas. 

 As the spots increase in size their surfaces 

 become sunken and contain numerous small, 

 black pimples. Usually the entire grape is 

 diseased and dries into a hard, shriveled 

 mummy. Reddish brown spots appear on 

 the leaves. Spray with Bordeaux mixture 

 (5-5-50) as for anthracnose; destroy mum-, 

 mies; make applications of spray just before 

 rains. 



Downy mildew {Plasmopara viticola). 

 Appears first on upper side of leaves as small 

 yellowish spots, indefinite in outline. As 

 these enlarge they turn brown and become 

 dry and brittle. On the lower side of the 

 spot a downy white growth, noticeable 

 especially in moist weather, appears. 

 Other parts of the vines are similarly 

 attacked. Plow under old fallen leaves in 

 the Spring. Make 5 or 6 applications of 

 Bordeaux mixture (5-5-50) beginning just 

 before tl^e blossoms open. 



Powdery tnildew (Uncinula necator). 

 Powdery white patches are produced on 

 both upper and lower surfaces of the leaves. 

 Finally on these white patches small black 

 pimple-like bodies develop. Severe attacks 

 cause dwarfing of the vines. Dust the 

 diseased plants with sulfur from one to six 

 timea during the season, 



LETTUCE 

 Drop (Sdefotinia Libertihna). Causes 

 wilting of the plants which drop to the 

 ground. "White cctton-like growths appear 

 on the underside of the leaves. Later small, 

 hard, black bodies are formed. Remove 

 and burn all diseased plants. Greenhouse 

 beds may be disinfected with formaldehyde. 

 Very difficult to control especially in field- 

 grown lettuce. 



Gray mold (Botrytis sp.). Seldom 

 cerious in the field . The edges of the outer 

 leaves are first wilted, the wilted patches 

 becoming covered with grayish, downy fuzz. 

 The whole leaf may be affected and die, the 

 disease working slowly toward the center 

 of the head. Avoid high temperature, 

 excessive moisture and poor ventilation. 



LILAC 

 Mildew {Mlcrosphaera AlnT). White 

 powdery patches form on the leaves. Later 

 in the season these become a grayish white 

 and bear minute black spherical bodies. 

 Dust with sulfur. 



LILY 



Blight (Botrytis sp.). Yellowish brown 

 spots appear on the leaves and buds early 

 in the Spring. Later these enlarge and 

 become covered with a light brown dusty 

 mold, which destroys the leaves and blos- 

 soms. Remove infected plants and burn,. 



MELON 



See Cucumber. 



ONION 



Blight or Downy mildew (Peronospora 

 Schteideniana) . At first patches of fuzzy 

 down cover the affected leavos; these spots 

 are soon blanched and in a short time the 

 leaves are entirely wilted over. Spray with 

 Bordeaux mixture. Not easily controlled. 



Neck rot (Botrytis Allii). Causes a 

 rotting of the Onion bulb at the neck, 

 accompanied by a grayish fuzz and hard 

 black bodies. The disease occurs in the 

 field but is particularly severe in storage. 

 Remove and destroy diseased plants. Store 

 bulbs in a cool, dry, well ventilated place. 

 Dry thoroughly before storing. 



Smut (Urocystis Cepulae). Attacks 

 young seedlings but not Onions grown from 

 sets. Shows on the seedling leaves as 

 elongated opaque spots, which finally 

 rupture and expose a black powdery mass. 

 Drill in formalin (1 pint to 16 gallons) with 

 the seed at the rate of 200 gallons per acre. 



