THE NATIONAL NURSERYMAN 
237 
and that it is well within the bounds of ] 30 ssibility that main- 
crop grapes can be profitably grafted. 
It is recommended that grape-growers try small vineyards 
of grafted grapes, using as stocks the three tried in this 
experiment. 
For procedure in growing a grafted vineyard the ex¬ 
periences given in this Bulletin should be taken in account, 
supplemented by a study of methods in California where 
grafted vineyards are commonly grown. Some of the prac¬ 
tices in California are discussed on pages 512-514 but a more 
extended study , of them should be made before engaging 
largely in growing grafted grapes. 
This Station is repeating this experiment; it is hoped 
under more favorable circumstances. 
The following is a summary of Bulletin No. 359 The Grape 
Leaf-Hopper by F. Z. Hartzell, published by the New York 
Agricultural Experiment Station. 
This bulletin deals with studies on the hibernating habits 
and spring food-plants of the grape leaf-hopper and with 
experiments to establish efficient ■ spraying practices. 
Large numbers of adults survived the winter of 1911-12 
dnd threatened many vineyards, but weather conditions 
auring the summer were unfavorable for the nymphs, causing 
a decrease of the insects during the late summer and autumn 
of 1912. 
The most favorable hibernating places for the leaf-hopper 
are fence rows, woods, brush and waste land, weeds or situa¬ 
tions where leaves accumulate by the wind. Grass which has 
lodged also affords winter shelter to the insects. The-drier, 
well-drained soils are more conducive to the safe wintering of 
the adults than the heavier soils. 
Green cover crops do not afford suitable rhibenating places 
for the grape leaf-hopper during severe winters. .■ ’ 
The foliage of raspberry, strawberry, blackberry, currant, 
gooseberry, catnip, Virginia creeper, burdock, beech and sugar 
maple is eaten by the grape leaf-hopper before it migrates to 
the foliage of the grape. Strawberry and raspberry are the 
preferred spring food plants. The insects migrate from the 
strawberry to the raspberry during early May and from the 
raspberry to the grape during the latter part of May. 
Mating of the hibernated adults takes place on the spring 
food plants. 
The foliage of the grape is injured by the overwintering 
adults, but most of the feeding is restricted to the lower 
leaves, especially those on the 3^oung shoots or suckers at the 
base of the vine. The amount of injury to vineyards varies 
directly with their proximity to favorable hibernating places 
and spring food plants. 
Spraying experiments during 1912 showed (i) that Black 
Leaf 40, one part to 1600 parts of water or Bordeaux mixture, 
is an efficient spray for the leaf-hopper. (2) The automatic 
attachment is a practical machine in the hands of careful 
sprayers. (3) The fruit from vines protected from the leaf- 
hopper is superior to fruit from vines subjected to the attacks 
of this pest. Chemical analyses of grapes from sprayed vines 
gives a gain of from 8 to 68 per cent, in sugar over those from 
untreated vines, while the unsprayed grapes had from o to 
20.6 per cent, more acid than sprayed grapes. 
The destruction of hibernating places of the gra])c leaf- 
hopper is recommended as a method of control, especially to 
save the young foliage of the gra]3c in the .spring. 
When hibernating adults are on the young foliage, delay¬ 
ing the removal of the young shoots at the base of the vine 
will tend to keep the insects on the lower leaves and thus 
afford some protection to the more i)ermancntfoliage. The 
lower shoots should be removed just ])revious to si)raying. 
FROM THE NEW JERSEY STATION 
The First Season with the Peach Orchard. By M. A. Blake. 
(Circular 14, pp. 3-31, pis. 10, fig. i.) 
Information is given as to the selection of the site and 
soil for peach orchards the grade, quality, cost, and treat¬ 
ment of nursery trees before 
Digest and Copy of Insecticide Law. (Circular ii, pp. 4.) 
This contains the text and brief explanations of the New 
Jersey insecticide law approved March 19, 1912. 
INVITATION FOR 1914 CONVENTION 
Mr. T. B. Meehan, President, 
American Association of Nurserymen, 
Dreshertown, Pa. 
Dear Sir; 
The Los Angeles Chamber of Commerce extends to the 
officers and delegates to the Annual Convention of the 
American Association of Nurserymen, which meets in Port¬ 
land, Ore., June 18-20, 1913, a cordial invitation to make 
their return trip via Los Angeles and to spend a few days in 
this city and in other parts of Southern California. 
We promise you an interesting and pleasant diversion and 
feel sure that you will find many things' to interest you in 
Southern California in connection with the important indus¬ 
try which you represent. It will enable you to personally 
inspect the orange and lemon growing industries, as well as 
the extensive grape culture of this section, together with the 
various speceis of fruit common to the temperate zones. 
You will also have an opportunity of visiting our beach and 
mountain resorts, which are unsurpassed in beauty in any 
part of the world. 
We will be obliged to you if you will give this invitation a 
wide publicity. 
Yours truly, 
Los Angeles Chamber of Commerce, 
Arthur W. Kinney, President, 
Frank Wiggins, Secretary. 
MR. P. A. DIX WAS THE AUTHOR 
Through an oversight the name of the author of “A New 
Quarantine,” as published in the April N.\tional Nursery¬ 
man was not given. It was Mr. P. A. Dix, Roy, Utah. Mr. 
Dix is to be congratulated on his ability as a writer, and we 
sincerely hope it is not the last time nurserymen will be enter¬ 
tained by his ])en through the columns of the N.\tion.\l 
Nurseryman. 
