525 



study was undertaken and is here described. Orchards that have not 

 been spraved for many years can only be protected by maintaining 

 the coating of poison on the fruit and fohage from the time the blossoms 



'^Vruaf pLi: if 'Ihe year included the Hessian fly [M^etiol. 

 destructor] and joint-worm [HarmoUta tritm], which considerably 

 damaged wheat, and Hadena fradihnea, Grote lined corn borer), 

 which infested maize on land ploughed from grass late m the spring. 

 The larva of this moth bores into the young stalks and destroys tne 

 growing shoots. In an old weed field, ploughed late in the season 

 and planted with maize, an unidentified webworm destroyed the 

 planting. Against pear psylla [Psylla pyricola] it is recommended on 

 further investigation, that the whole tree should be sprayed at one time 

 from above and below with the dormant season treatment at winter 

 strength. This treatment should be started in the autumn, before 

 the adults migrate into the bark, and completed in the spring. Ihe 

 San lose scale [Aspidiotns perniciosus] is also checked by this spray. 

 Spraving with winter strength Hme-sulphur (1:9) above and below 

 as the buds begin to open destroys the eggs and damages neither fruit 

 nor foliage. Summer strength lime-sulphur (1:40) destroys the 

 immature forms covered with honey-dew. This spray -scorches both 

 fruit and foliage, but successful experiments were earned out with 

 self-boiled lime-sulphur, which requires more thorough application 



Further experiments on the horse-radish flea-beetle [Phyllotreta 

 armoraciae, F.] were carried out with equal parts of powdered lead 

 arsenate and sulphur; Bordeaux mixture 3:5:50; Bordeaux 

 mixture 5 : 5 : 50 and \\ lb. powdered lead arsenate ; lead arsenate 

 alone W lb to 50 U.S. gals, water ; and Bordeaux mixture 3 : 5 : 50 

 plus 'l lb. Paris green ^o each 60 U.S. gals. The dusting with 

 lead arsenate and sulphur was the most effective, but lead arsenate . 

 alone was ineffective. Bordeaux mixture in all forms stunted growth. 



Experiments against the onion maggot [Hylemyta antiqua\ are 

 described. Baits were set as the flies began emerging early m April 

 before the young onions showed above the ground. Clam shells 

 proved the best carriers of the bait, which consisted of 2 U.S. quarts 

 molasses to 1 U.S. gal. water in which 1 oz. of sodium arsemte had been 

 dissolved. The baits should not be placed further apart than the 

 corners of fiftv-foot squares. 



A more extensive study was made of the lima bean maggot {Phorbia 

 fusciceps) than had been undertaken in 1917 [R.A.E., A, vm, 44]. 

 It was proved that the soil was infested either with the eggs or the 

 larvae or both when the beans were planted. The results of seed 

 treatment show that the damage can be reduced without interfering 



with germination. . ^, rr t. ^f 



Experiments with various chemicals to determine the etlect oi 

 atmospheric moisture on the rate of development of the bean weevil 

 [Bruchus ohtectus] were made, but not completed. 



Petersox (\) Response of the Larvae of the Peach Tree Borer 

 {Sanninoidea exitiosa, Say) to various Measures for Control and 

 additional Notes.— i^f^/- Nau Jersey Agnc. Expt. Sta., IJlb-W, 

 New Brunsivick, N.J., 1920, pp. 402-419, 4 tables. 1 plate. 

 [Received 6th September 1921.1 

 Some additional notes are given on the adults and eggs of the peach- 

 tree borer, Aegeria [Sanninoidea) exitiosa, Say, special attention 



