94 
ORCHARD MOTH CATERPILLARS. 
bestowed much attention on the subject of caterpillar prevention, and 
who, as well as the two above-named gentlemen, is a member of the 
Evesham Fruit Conference Experimental Committee, wrote me that 
he “ found a wonderful difference in the quantity of moths caught on 
the grease bands on trees syringed with Paris-green in the summer, or 
rather in late spring, and those not syringed. Trees growing side by 
side have hundreds of moths caught in the one case, and comparatively 
none on trees dressed.” 
I gladly accepted Mr. Hiam’s offer to furnish me with precise 
details of treatment and results, as these records are just what are of 
so much value to possess and so difficult to procure. Therefore I give 
Mr. Hiam’s Report, sent me on Nov. 22nd, verbatim as follows:— 
“ The following brief remarks are respecting the results of my 
experiments with London-purple and Paris-green, in connection with 
the Evesham Experimental Committee on Fruit Pests.”—J. H. 
“No. 1.—London-purple fluid, applied to an Apple tree early in 
April before the buds had opened, and when the caterpillars of the 
Winter Moth were hatching out. Strength, 20 parts of water to 1 of 
London-purple, applied with a fine nozzle syringe. Second application 
after bloom had set. 
“ Results. —A fine crop of very clean nice fruit. 
“Band of grease dressing applied to tree stem on waterproof paper 
early in October : not a moth caught, neither male or female, although 
the band is in excellent condition. 
“No. 2.—Apple tree syringed with Paris-green before the buds 
expanded, and again after the fruit had formed. Strength, 1 oz. to 
10 gallons of water. 
“ Excellent results. —Tree laden very heavily with medium-sized fruit. 
“ Grease band has caught one female moth and four males. 
“No. 3.— Standard orchard Apple tree, 20 in. circumference, 
syringed with Paris-green after (but not before) blooming. 
“ Results. —Very little fruit. 
“ Caught on grease band three females and fourteen male moths. 
“ No. 4. — Standard orchard Apple tree, 36 in. circumference. 
Syringed with Paris-green too late to save the bloom. 
“ Caught on grease band three females and twenty-one males. 
“ No. 5.—21 in. circumference. Syringed with Paris-green some¬ 
what earlier than No. 6 ” [precise date omitted, Ed.] , “ but probably by 
about the end of April: this is too late for the first application for some 
kinds of Apples. It bore some fruit. 
“ Four females, twenty-two males. 
“ No. 6.—30 in. circumference. Was syringed with Paris-green 
about the end of May, when it was apparent that the caterpillars were 
fast clearing it. It had only one dressing, and the foliage which 
