310 



It is estimated that these bud -moths reduce the crop by about 

 30 per cent, in unsprayed or poorly sprayed apple orchards in Nova 

 Scotia. About 75 per cent, of the insects can be destroyed and the 

 crops increased about 22*5 per cent, by two thorough applications of 

 poisoned spray applied before the blossoms open, with a nozzle throwing 

 a coarse driving spray. Open planting and thorough pruning help in 

 the control by allowing the wind to blow away and destroy many of 

 the adults when they are on the wdng in June and July. Damage to 

 fruit is caused in the autumn by the larvae attaching the leaf on which 

 it is feeding to the fruit, eating through the skin and injuring its 

 8 ppearance and keeping qualities. A spray that has proved one of the 

 best combinations tested, and particularly harmless to foliage when 

 applied as a drenching spray, is composed of sodium sulphide (either 

 soluble sulphur 2| lb. or sulfocide 2i quarts) and calcium arsenate 1 J lb. 

 with freshly slaked stone hme or hydrated lime 12 lb. to 100 gals, water. 

 This combination is one of the cheapest and most effective for biting 

 insects. Probably one of the most satisfactory sprays in the control 

 of serious infestations is straight paste lead arsenate, 10 to 15 lb. 

 to 100 gals, water, to which from 5 to 10 lb. water- slaked or hydrated 

 lime has been added to prevent yellowing by absorbing the free 

 arsenic. At these strengths lead arsenate is as good a fungicide as 

 lime-sulphur. A contact-spray consisting of soluble sulphur 21b., 

 nicotine sulphate 1 pint, fishoil soap 4 lb. and water 100 gals., 

 applied as a drenching spray immediately before the blossoms has given 

 almost perfect control of bud-moths as well as canker-worms, fruit 

 worms and many other Lepidopterous larvae. 



Recorded parasites of E. ocellana include : — Microdus ocellatiae, Rich.. 

 M. latuinctus, Cr., Anomalon sp., Chelonus sp., Trichogramma 

 {Pentarthron) minutimi, Riley, Phytodietus vulgaris, Cr., Pimpla sp., 

 near P. alborida, Cr., Pimjjla conquisitor, Say, and Mkrodus {Bassus) 

 earinoides, Cr. 



Pimpla alboricta, Cr., Meteorus communis, Cr., and three other 

 species of undetermined Hymenopterous parasites have been reared 

 from 0. consanguinana. 



Bodkin (G. E.). Report of the Economic Biologist. — Brit. Guiana 

 Dept. Sci. & Agric, Re pi. for the Year 1917, Georgetown, 8th May 

 1918, 14 pp. [Received 24th May 1919.] 



In spite of the continued application of the usual remedial measures 

 sugar-cane pests did not show any decrease in the year under review. 



Rubber {Hevea hrasiliensis) suffered chiefly from attacks of the 

 Venezuelan locust. 



Brassolis sophorae, L., made its appearance on coconuts, but owing 

 to timely warnings a repetition of the outbreak of this butterfly in 

 1913-14 was prevented, although several areas had to be quarantined. 

 Other coconut pests reported were the moth, Castnia licus, Drury, 

 the giant locust, Tropidacris latreillei, Perty, and the Venezuelan 

 locust. 



The only infestation of Citrus trees of importance was that by Atta 

 cephalotes, L. Details of the destruction of this ant by means of 

 carbon bisulphide are given. 



