- 15 - 
a Dispar L.," a tree moth 
arance 
center 
Larvae 
art early 
No entomological survey has ever be^n made in Yugoslavia and 
until this is done and veld-defined methods of instructing the peasants 
and the farmers in the use of preventive measures, the protection of the 
orchards must be left almost entirely to "natural control" resulting from 
the counter warfare of hostile parasites. Although the spraying of the 
vineyards is a well established practice, prune trees are given this 
protection only -in very rare instances. ;-The spraying when done is only 
effected with one preparation v-hereas almost each type of pest reouires 
different treatment at different tim^s. 
Spraying 
It is only since the appearance and spread of the scale (Schild- 
laus) that any attention has been given to. the matter of spraying. Occasion- 
ally tree trunks are white-washed but that appears to be done more to 
enhance the appearande of the homestead than to control any particular 
insect or disease. Except on the poorer soils and the scale infected 
orchards, the trees appeared thrifty in spite of lack of spraying. Up to 
the appearance of the scale, the resistance of the native wi Id line variety 
to disease was one of the strong arguments in its favor. At the prune 
conference held in Belgrade in December 1928, it. was freely admit tea that 
the attack and spread of the Schildlaus is alarming and difficult to cope 
with in the older orchards. The leaders in the industry accordingly re- 
commended legislation to compel all growers to spray and thoroughly clean 
their orchards at one time. 
Quality of Yugosl a v prune s 
The raality o£ the Yugoslav orune from the standpoint of acidity 
has been freouently stated as falling somewhere between the California 
and Oregon prunes. It is not as s ,r eet as the California prune nor as 
tart as the Oregon variety. Unfortunately no adequate comparisons as to 
chemical contents of the fruit are possible. The Agricultural Experiment 
Station at Vienna on Decemoer 4, 1912 published the following analysis of 
the Yugoslav prune: Hon -nitrogenous matter 59.33 per cent; sugar 34.35 
per cent; nitrogenous matter 2.39 per cent in addition to ashes, ethereal 
extracts and raw filaments. It is somewhat difficult to make a comparison 
as to relative ouality, as drying and preparing for the market in Yu o- 
slavia differ entirely from practices on the Pacific Coast. The Yugoslav 
fruit of seedling tendencies has a flavor peculiarly its own, appreciated 
in certain markets. 
