Show I MOSAIC ISA SEi SE- SE i OF SUGAR CANE Federal Agricultural Department Taking Measures to Stamp It Out Pl PI ENTY OF HEALTHY HEALTH STOCK ease If Unchecked Disease May Do In Incalculable local r- r Damage to Great Cane Cana Growing Sections of the South South- M Must Must Use Pure Seed VV r V pr Prepared by th they the United States Department Department Depart Depart- ment meat of ot Agriculture The Washington Th The United States deI department de- de de de- I of agriculture is issuing a II bulletin containing several colored d plates mus Illustrating the mosaic disease of sugar cane which h sh should uld enable those interested in this disease of cane to l identify it The mosaic disease of ot sugar cane which has been known for several sever years in n a number of other countries cane cane countries has recently been found In the southern United States Stales While this tills disease Is quite widespread in the states there are ale many disease free disease free areas from which clean seed cane may maybe maybe maybe be be obtained The mosaic disease which has done considerable damage to to the cane crop cropIn In Porto Rico and some other cane countries Is one of the most serious maladies that has confronted cane growers in recent years and If unchecked unchecked un un- un checked may do Incalculable damage I Ito to the gr great at growing cane-growing sections of the South To Eradicate Disease I The measures of control now being I taken by the federal federl authorities in co cooperation I co-I operation with various local agencies w were re preceded by a complete survey of the Southern states undertaken to ascertain as asI ascertain ascertain as as- I I certain the extent of the infected terl areas arens In badly diseased fields elds the only remedy Is to grind up all nil the stalks say bay the representatives representative cs of the department department department depart depart- ment of agriculture This means of f course couise that carefully selected seed cane must be brought in from other ther regions regions re reo re- re gions for foi replanting T There ere is still sun an nn V k y Late Canker Stage of Mosaic Disease on Canes of New Caledonia Variety Cane In Center Is Healthy abundance of ot healthy stock In Louisiana Louisi ana and the other cane states so EO that the he industry should not seriously suffer suf- suf er ter from these attempts at eradication Where the disease has not obtained a B strong foothold is recommend recommend- ed of pulling up infected infect infected ed plants root stem and branch and throwing browing them down beta between een the rows As soon as the plants wilt they are no longer dangerous as a source of ot infect tion In damp regions however care must be taken to gather up these plants and burn them or otherwise destroy destroy destroy de de- de- de stroy them lest while lying on the ground they sprout and BO so spread the disease Appearance of Mosaic Disease It is difficult to describe the appearance appearance appearance appear appear- ance of sugar sugarcane mosaic verbally and this is one of the reasons why the federal authorities are using a bulletin with colored illustrations By means of this bulletin anyone can readily as as- c certain the exact appearance of l infected infect ed cd plants plants' This disease is an Infectious similar in many respects to the he mosaic disease of tobacco cucumber ber cr bean tomato and potato Scientists Selen- Selen have come to the conclusion that some virus is responsible for the appearance appearance ap of all new cases and that the only source of Infection is some other Infected plant Experiments In Porto PortoRico PortoRico PortoRico Rico and elsewhere have ha repeatedly demon that cuttings from Infected infected In- In stalks will Invariably give rise to o Infected plants The shoots seem to o be mottled as soon as they appear lher fole the use of diseased stalks for planting results In a wider distribution distribution distri distri- f button of the disease and insures the survival of the virus even In the absence absence ab ab- sence since of secondary Infections |