July 1, 1916 



HORTICULTURE 



29 



PINOLYPTOI 



WEED KILLER 



THE VERY NEWEST AND QUICKEST METHOD OF DESTBOVING WI^EDS, 



GRASS AND OTHER GROWTH IN (iAKI)EN WALKS. GUTTERS, 



TENNIS COURTS, DRIVEWAYS, ETC. 



This fluid absolutely destroys all weeds and other growth wherever applied, 

 and its effect on the ground prevents the growth of fresh ones for a year and 

 thus saves a great deal of time and labor, as no cutting,- hoeing or hauling away 

 of the weeds is required. 

 We manufacture the strongest line of DISINFECTANTS on the market. 



P.-L CHEMICAL CO., 507-509 W. 19th St., New Yo(1( 



CORRESPONDENCE SOLICITED. 



tors about the gardens and through 

 the large greenhouse ranges. 



Looking down upon the gardens on 

 the approach irom the roadway the 

 eye beheld a magnificent sight in the 

 acres of_ plantings which were one 

 mass of iorgeous color. The rose gar- 

 den was the centre ot attraction, al- 

 though the visitors found much of in- 

 terest in the different outdoor depart- 

 ments, including the rock garden 

 which is now under course of con- 

 struction. The mammoth greenhouse 

 proved a revelation to some of the 

 visiting gardeners, where the roses, 

 carnations and chrysanthemum plants, 

 in untold quantities, were found in 

 excellent condition, as were also the 

 many other varieties of flowering and 

 foliage plants in which this company 

 specializes. 



The company maintains its own 

 dairy, private water system and box 

 factory and after the inspection ot the 

 entire plant, the opinion was generally 

 expressed that Cromwell Gardens may 

 appropriately be classed as a '"plant- 

 growing industry." All the details for 

 the entertainment of the party were 

 carefully planned — the usual afternoon 

 rain was not even omitted. 



The visitors enjoyed their visit to 

 Cromwell Gardens and when they en- 

 tered the automobiles to make theii- 

 train connections for home, they were 

 in one accord that the day had been 

 one full of interest and instruction. 



CUCUMBER MOSAIC DISEASE. 



iri-om Bulletin of T. S. Dept. of .Afrri- 

 culture.) 



A new disease of cucumbers, known 

 as the mosaic disease, has appeared 

 during the past few years In commer- 

 cial greenhouses and in fields where 

 cucumbers are grown for pickling- 

 purposes. necent investigations of 

 the disease have resulted in the dis- 

 covery that it is closely related to 

 mosaic diseases ot other plants, and 

 the present indications are that it 

 can be controlled by the introduction 

 of sanitary measures and insect con- 

 trol methods. 



The mosiac disease is commonly 

 known in Michigan, Indiana, and 

 Wisconsin as "white pickle." In 

 Minnesota it is commonly called 

 "nubbins." When plants are attacked 

 while very young, they are markedly 

 dwarfed by the action of the disease, 

 growth is slow, the runners are very 

 much shortened, the leaves are cor- 

 respondingly reduced in size, the 

 plants blossom sparingly, and the 

 amount of fruit is very much re- 

 duced. When older plants become 

 diseased the principal visible effects 

 are on the subsequent growth of 

 vines and fruit, the vine tips and 

 leaves being dwarfed and mottled 



and the fruit mallonned as described 



elsewhere. 



The leaves of diseased plants are 

 dwarfed, often curled and wrinkled, 

 and usually have a mosaic or mar- 

 bled appearance in which areas of 

 light and dark green alternate. In 

 some cases the leaves brown and die 

 back from the tip. 



The fruits are very conspicuously 

 affected, being dwarfed, more or less 

 mottled or blotched with areas or 

 darker green on a background of 

 light green, .greenish yellow, or 

 almost white. In the most decided 

 cases the green areas are raised and 

 appear as definite warts or protuber- 

 ances, sometimes of considerable size, 

 and the fruits take on many abnor- 

 mal shapes. In some cases the fruits 

 are almost white, hence, the name 

 "white pickle." This name probably 

 is due to a confusion of this diseased 

 condition with the white or albino 

 plants which typically bear white- 

 colored pickles, and which have been 

 known to occur occasionally in fields 

 for many years. The discoloration 

 and warty condition of the fruits, 

 which often appear on cucumbers not 

 more than an inch or two long, ren- 

 der them unfit for pickling purposes, 

 so that in addition to the great re- 

 duction in yield caused by the dis- 

 ease, many, if not all, of the fruits 

 pr.Dduced by diseased vines are un- 

 marketable. 



In the greenhouse the disease is 

 quite similar in its principal symp- 

 toms to those found in the field, the 

 principal difference being that the 

 disease appears to be more virulent, 

 many of the plants wilting and dying. 



Nature of the Disease. 



The mosiac disease belongs to the 

 same class as the other mosaic dis- 

 eases of tobacco, potato, tomato, poke 

 weed, and other plants, which have 

 been known for some time. The 

 exact cause has not been discovered, 

 but it is considered to be what is 

 known as a filterable virus, an agent 

 of infection which is so finely divided 

 that it will pass through a porcelain 

 filter and still retain its ability to 

 reproduce the disease when injected 

 into healthy plants. The sap or 

 juice of any portion of a diseased 

 vine if injected into a healthy vine 

 will produce the disease. The period 

 of incubation, that is, the time which 

 elapses from the inoculation of the 

 vine to the first visible symptoms of 

 the disease, in the greenhouse is from 

 7 to 14 days, while in the field it is 

 usually 14 to 25 days. The agencies 

 of transmission of the disease from 

 diseased to healthy plants are doubt- 

 less many. It has been definitely 

 proven tiaat plant lice transferred 

 from diseased to healthy plants will 

 carry the disease. It is highly prob- 

 able" that other insects will be found 



to act as carriers. It is also practi- 

 cally certain that the disease is 

 spread by pickers when harvesting 

 the cucumbers. 



Rigid insect control measures 



The RccoKnlzed Standard Inaectlolda. 

 A ipray remedy for green, black, whit* 

 fly, thnps and soft scale. 



Qnart, $1.00; Gallon, ft.io. 



NIKOTIANA 



A 13% nicotine aolntlon properly dilDta4 

 for nmlfating or vaporlilnff. 



4urt, nsO; Galleiii, HM. 

 Until fa rther notice ahtpmenta on our 

 prodncU rUNOINK, TBBMINB and BOA. 

 L,INB will be anblect to condltlona of tk* 

 cbemlcal market. 



Prompt ablpmenta can be guaranteed o& 

 AFHINK and NIKOTIAirA. 



Aphine Manuf acturing Co. 



MADI90N. N. J. 



4- 



IMP. 

 SOAP SPRAY 



!■ a BClentiflcally prepared eompoond 

 that U hiehly efficient for AL.L, inaeet 

 pests. Why bother with several sprays 

 when this will answer every parpose 

 throusbout the year? 



LOOK FOB THE IVY LEAT TBADB 

 BfABK. 



Ask your dealer or write 



EASTERN CHEMICAL CO., BOSTON 



NIKOTEEN 



For Spraying 



APHIS PUNK 



For Fumigating 

 Ask Your Dealer For It. 



NICOTBIE MFG. CO. 



ST. LOUS 



HYPER -HUMUS 



PROVEN QUAJ^ITY 



Best for Greenhouse, Narsery, 



Lawn and Garden 



rriie. $«J.«0 Ter Ton in Bnlk, F. O. B. Cora 



Further Information I'pou Request 



COLIN CAMPBELL 



90 Nassau Street, 



NEW YORK CITY 



