Salt Lake Telegram | 1931-06-10 | Page 5 | Your Garden

01 0 Seasonal duly dally advice and suggestions aUnts on or preparation of toll soil planning plan plan- U YO YOUR U R ning planting and flower culture by byone a one of or the foremost in Salt Lake City Questions addressed to this column will m bo be answered G GARDEN GARDENS A R D E N promptly when nhen accompanied by byname byname name and address s both of which S I will ullI be omitted upon request 0 L BLACK SPOT OF ROSES I It seems stems very suddenly that roses In this locality have b been en subject to black spot disease e known as black spot leaf blotch or leaf spot isone is isone isone one of ot the thc most destructive diseases on roses The symptoms of the disease arc black blotches on the upper surface of the thc leaves The spots are first small but they increase in size to half an inch in diameter Often a n. number of spots coalesce involving a considerable part of the leaf leat tissue A very marked character Is Is the fringed border of ot the spots Severely Se affected leaves usually turn tum yellow and fall prematurely The rose rosc plants severely affected become defoliated In the summer in many cases causing caming causing caus cam ing the leaf lent buds which should re remain remain remain re- re main dormant until the following year to open late in ill the season It If black spot once gets a good start your our rose crop will be poor dwarfed and unhealthy looking One should watch for any symptoms and check a further further fur fur- ther thor development immediately The Thc cause caure of at this disease known as black spot of roses Is the fungus rosae Spores of ot the fungus which are borne in the black spots on the leaves are arc disseminated or spread by wind and rain to new foliage where they produce new in in- in Special fruiting bodies which have hard outer coats develop In the diseased leaves that fall to the ground and carry the fungus over o winter This Is one reason why cleanIng cleanIng cleaning clean clean- ing up and disposing of debris away from the garden Is so strongly urged In the spring of the thc year Otherwise these fruiting bodies are arc given ghen another another another an an- other chance to cause Infection Bordeaux mixture or a dust mixture mixture mix mix- ture turc consisting of 95 parts finely ground sulphur and five parts powdered powdered powdered pow pow- dered lead arsenate will control the black spot disease The first application application application cation should be made early In the summer soon after the first new le leaves l es arc developed Four or five subsequent treatments should be made at Intervals of at about two weeks Faithful application of either of these mixtures should rid your rose garden of at the infestation