104 B.C. Entomological Society. 



The mixture used is a modification of the Kansas grasshopper bait, and 

 was first used by the writer in the spring of 1917 on a small city garden- 

 patch with perfect results. 



In many districts cutworms are always present in sufficiently large 

 numbers to warrant the application of a poisoned bait every spring to pro- 

 tect the crops. The broadcast method has the advantage that no green food 

 is present to detract the cutworms from the bait, which is consequently 

 greedily eaten. The desired results are thereby obtained. 



Owing to war conditions the cost of material in the spring of 1918 was 

 high, being: Bran, 5olb., $1.05; molasses, 5 lb. (approximately 2 quarts), 

 50 cents; lemons, 6 fruits, 25 cents ; Paris green, i lb., $1 ; making a total 

 of $2.80 for material sufficient for about 7 acres. With the labour of prep- 

 aration and application the total cost should not exceed 55 cents per acre. 

 Under normal trade conditions the lower cost of material would reduce this 

 to approximately 40 cents per acre. 



Every endeavour should be made to treat land before planting, as the 

 quantity of bait required per acre to treat planted land greatly exceeds the 

 broadcasting method, and the time required to apply the bait, so as to avoid 

 direct contact with the growing plants, can bear no comparison. Further- 

 more, the effectiveness of the bait is considerably reduced, as when succu- 

 lent young plants are present the cutworms are liable to give them preference 

 to the bait. 



The most important point in the preparation of the bait is the thorough 

 mixing of the bran and Paris green. These ingredients must be mixed in 

 their dry state in the endeavour that each flake of bran shall bear a particle 

 of the poison. The water must not be added in bulk, but worked in gradu- 

 ally and thoroughly. If this is not done the addition of the water will free 

 a considerable percentage of the poison from the bran-flakes, thereby making 

 the bait less effective, it being remembered that only a small quantity of the 

 bait will be consumed by one cutworm. 



GENERAL RECORDS OF WORK CARRIED ON IN THE 

 UNITED STATES AND CANADA IN 1918. 



Bv R. C. Treherne. 



In Control of Cabhagc-zvonn lead arsenate and calcium arsenate gave 

 best results (i lb. powder, 2 lb. paste to 40 gallons, with i lb. laundry-soap). 

 Zinc arsenate, tobacco-dust, lime, of no use at all. Dusting is becoming the 

 recognized way of controlling cabbage-infesting insects. 



(a.) Arsenate of lead powder or Paris green mixed with 20 times its 

 bulk of hydrated lime or gypsum. 



{b.) Sulphur, 50 parts; tobacco-dust, 40 parts; lead arsenate, 10 parts; 

 used in cheese-cloth bag by shaking, or by regular dusting-machine, costing 

 approximately $30. 



