20 DIRECTOR’S REPORT OF THE 
and are recommended for the treatment of old trees. Miscible oil 
in the proportions used has prevented important injuries to the 
trees and has generally proven an efficient remedy for the scale. 
These preparations of good grade are among the most satisfactory 
substitutes for orchardists who do not desire to employ home-made 
mixtures, | 
Screening for the protection of cabbage seed beds.— This bulletin, 
No. 301, deals with experiments to test the value of cheesecloth 
screening for the protection of cabbage seed beds against injuries 
by root maggots. In most sections of this State where cabbages 
are raised, the growers experience much difficulty in raising enough 
seedlings, of required size, to plant the desired acreage, because of 
the destructiveness of these insects. Of the various measures that 
have been employed in the experiments with this pest, screening of 
the plants has afforded the most efficient protection to seed-beds. 
Because of its efficiency for this purpose, the attention of growers 
is called in this bulletin to the value of screening of beds as one 
means of protecting plants from injuries by root-maggots. 
In the experiments, four large beds were made, the seed being 
sown respectively on April 29, May 13, May 17 and May 28. 
Screening was applied to 21 rows, of 150 feet in length, of the 
planting of May 13. The remainder of the bed, consisting of 68 
rows of equal length, was considered as a check. Plants raised 
under cloth grew faster and reached the desired size for trans- 
planting one week before the seedlings in the check area. The 
screened sets were seasoned by the removal of the covering thirteen 
days before the time of replanting, and showed no more wilting 
when transplanted than did the check seedlings. The screened bed 
was entirely free of maggots, and produced 50,000 sets, which were 
replanted. The check bed, of more than three times the size, 
yielded only 30,000 desirable plants. The cabbage-maggots were 
generally very destructive to unprotected seedlings. The experi- 
ments show that screening entirely protects seedlings from injuries 
by maggots, and indicate that it is possible to season the plants, by 
removal of the covering a few days before transplanting, so as to 
avoid the excessive wilting and losses which sometimes attend the 
planting in the field of sets grown in covered frames. 
Dipping of nursery stock in the lime-sulphur wash.— Dipping in 
the lime-sulphur wash is a method of treatment proposed for the 
disinfecting of nursery stock for such pests as the San José scale, 
wooly aphis and other destructive insects, Its utility for these pur- 
