THE NATIONAL NURSERYMAN 
199 
soiling all former Rules. The most important change 
is the provision that permits to import nursery stock 
from countries which maintain nursery stock inspection, 
and permits to import orchids and tree seeds from coun¬ 
tries which do not maintain nursery stock inspection, in¬ 
stead of being re-issued each year, will he valid until re¬ 
voked. 
tomology. (Professional Paper). Apr. 22, 1916. (De¬ 
partment Bulletin 351). Price, 15 cents. 
Describes life history, habits, enemies of, and methods 
of control for this insect, with report of investigations 
had at Mont Alto, Pa., in 1912 and 1913. 
LEAF BLOTCH OF IlORSE-CIIESTNUT 
BULLETINS OF INTEREST TO NURSERYMEN 
Published by the U. S. D. of A. 
Apply Editor and Chief of the Division of Publication 
The Rose-Chafer. A Destructive Garden and Vineyard 
Pest. By F. II. Chittenden, In Charge of Truck-Crop and 
Stored-Product Insect Investigations, and A. L. Ouaint- 
ance, In Charge of Deciduous Fruit Insect Investigations. 
Pp. 8, lig. A. Contribution irom the Bureau m Entomol¬ 
ogy. Apr. 28, 1916. (Farmers’ Bulletin 721). 
Describes life history and habits of, and methods of 
control of this insect. 
The Leaf Blister Mite of Pear and Apple. By A. L. 
Ouaintance, In Charge of Deciduous Fruit Insect Investi¬ 
gations. Pp. 6, figs. A. Contribution from the Bureau of 
Entomology. Apr. 21, 1916. (Farmers’ Bulletin 722). 
For general distribution. 
The Oyster-Shell Scale and the Scrufy Scale. By A. 
L. Quaintance, In Charge of Deciduous Fruit Insect In¬ 
vestigations, and E. R. Sasscer, Collaborator. Pp. 16, 
figs. 3. Contribution from the Bureau of Entomology. 
Apr. 26, 1916. (Farmers’ Bulletin 723). 
Of interest to fruit growers generally. 
The Terrapin Scale: An Important Insect Enemy of 
Peach Orchards. By F. L. Simanton, Entomological As¬ 
sistant, Deciduous Fruit Insect Investigations. Pp. 96, 
pis. 3, figs. 19. Contribution from the Bureau of En- 
Frorn New York Stale College of Agriculture at Cornell 
University. 
A bulletin describing the fungous disease known as the 
horse-chestnut leaf blotch, and giving recommendations 
for its control, has just been issued by the New Vonk 
State College of Agriculture at Cornell. 
The disease, it is stated, is first indicated by a slight 
discoloration on the foliage. As I he disease advances 
this discoloration becomes larger and that part of the 
leaf which it affects appears water-soaked. When the 
disease is very prevalent the foliage appears in its final 
stage to have been scorched by fire. 
The first infection in the spring is said to come from 
spores in old dead leaves on the ground. Much damage 
may be prevented by turning under or burning the dead 
leaves before the new foliage is developed. To fore¬ 
stall the attacks of the fungus on the new foliage, the 
college authorities recommend spraying with a lime-sul¬ 
fur solution, one gallon to fifty gallons of water, or bor- 
deaux mixture; or dusting with a mixture of ninety 
parts of finely ground sulfur and ten parts of powdered 
arsenate of lead. 
A comparison of results on sprayed and dusted trees 
leads to the belief that the dust method is the more effec¬ 
tive because the mixture floats through the dense foliage 
and reaches all the leaves in a much more satisfactory 
manner than the lime-sulfur solution or bordeaux mix¬ 
ture. 
J. B. PILKINGTON 
Portland, Oregon 
Chairman of Executive Committee 
American Association of Nurserymen. 
L. A. BERCKMANS 
Agusta, Georgia 
Chairman of the Co-operation with 
Entomological Committee 
American Association of Nurserymen. 
E. A. SMITH 
Lake City, Minn. 
Chairman of the Root Knot Committee 
American Association of Nurserymen. 
