172 THE PLUM CURCULIO. 
western New York. According to the manufacturer, the umbrella 
was made in sizes of 8, 10, and 12 feet, costing from $15 to $16.50, 
according to size. 
Many growers who have jarred for this insect, and especially where 
labor has been abundant, have preferred to use sheets on frames. 
Extensive work has until recently been in progress in the orchards of 
the Hale Georgia Orchard Co. and elsewhere in the South. The 
sheets and mode of use are shown in Plate XIV, figure 2. 
PRESENT STATUS OF JARRING. 
The last few years have witnessed a notable increase in spraying 
for the curculio, with a corresponding decrease in jarring. This old 
remedy will doubtless more and more fall into disuse with the increase 
in spraying operations. 
One of the largest jarring operations recorded is that by Messrs. 
W. M. Scott and W. F. Fiske. 1 During 1900 a Georgia orchardist 
jarred 200,000 bearing peach and 50,000 bearing plum trees about 
six times during the period from April 18 to June 1. Eleven gangs, 
or 55 hands, were engaged in the work, at a total cost of about $1,000. 
It was estimated that about 137,000 curculios were caught during 
the season. Curculio damage in tins orchard was placed at about 4 
per cent of the crop, as compared with an estimate of about 40 per 
cent injury in an adjacent orchard of 130,000 trees. 
Although jarring had so long been in use, and was so generally 
recommended, there are practically no precise data in literature 
indicating just what degree of protection is afforded, nor any rela- 
tive to its value as compared with its cost. 
During 1906, at Myrtle, Ga., an attempt was made to secure data 
on the value of this work on peaches. A block of 1,000 6-year-old 
Elberta trees was selected from a larger block of 10,000 trees and 
jarred every other morning from April 11 to June 9. Twelve trees 
in the jarred block were used for making examinations of the fruit 
throughout the season and an identical number were used in the 
larger, unjarred block of the same variety. The results are shown 
in Table LXXXVI : 
i Bui. 31, n. s., Bur. Ent., U. S. Dept. Agr., pp. 24-35, 1902. 
