446 



recommendations for the control of each. A list of these insects is 

 arranged according to the host-plants and the type of injury. Among 

 the lesser-known pests are Coccoforus pnmicida, Walsh (plum gouger), 

 which is one of the worst pests of native plums in Colorado. The 

 beetles puncture the skin of the fruit and deposit their eggs in the 

 holes ; the larva then eats into the pit, destroying the seed. Pupation 

 takes place in the seed, the adults appearing about the time the fruit 

 matures and hibernating in the soil. The measures recommended are 

 shaking the trees in the early morning from the date of opening of 

 the blossoms and spraying with arsenate of lead soon after the blossoms 

 fall and again 10 days later. 



A native sawfly, Gymnomjclius appendiculatiis, Hartig, attacks the 

 foliage of currant and gooseberry. There are two generations, one 

 appearing in June and the second in August. Eggs are laid in the 

 edge of the leaf between the two outer layers. The sprays recommended 

 are 4 lb. arsenate of lead or 1 lb. Paris green in 100 U.S. gals, water, 

 used before the fruit is picked. White hellebore, 1 oz. to 3 U.S. gals, 

 water, may be used on the fruit or, in the evening, hellebore or 

 pyrethrum dusted on the leaves. 



Strawberry pests include Ancylis comptana, Frol. (leaf-roller), of 

 w^hich the larvae web the two edges of the leaf together and feed 

 within the roll. Arsenate of lead, 5 lb. to 100 U.S. gals, water, should 

 be applied before the leaves are rolled, or about one week after the 

 moths appear in the spring. After the fruit is gathered straw should 

 be scattered over the plants and burnt. The Nematode, Tylodermafra- 

 gariae, Riley, eats into the crowns of the plants. This is particularly 

 a pest of old beds. WTien badly infested, one crop only should be 

 gathered before renewing and new beds should be placed at some 

 distance from the old ones. Burning straw is again recommended. 



The Agaristid moth, Alypia octomaculata, F. (eight- spotted forester) 

 attacks grape foliage. Arsenical sprays are recommended ; hand- 

 picking might also be practical. 



The sawfly, Eriocampoides {Endelomyia) rosae, Harr., in the larval 

 stage eats the upper surface of rose-leaves. Sprays of white hellebore, 

 arsenate of lead, black leaf 40, or dust sprays of freshly slaked lime 

 or wood ashes will kill many larvae, or they can be washed from the 

 leaves with a strong stream of water. 



The second part of the paper gives formulae and instructions for 

 the preparation of many insecticides, including poisons, contact sprays, 

 poison vapours, and repellents and insect traps. The methods and 

 apparatus used are described. 



Flour Mill Insects.— TF^^y. Press Bull. Penns. Dept. Agric, Harrishurg, 

 ii, no. 29, 19th July 1917. 



It is suggested that by equipping a mill with a steam heating system, 

 adequate for heating the mill to 60° F. in winter, the temperature can 

 be raised to 130° F. if the steam be turned on for 24 or 36 hours in 

 warm weather in June or September. This temperature, maintained 

 for four or five hours, should kill all stages of the Mediterranean flour 

 moth [Epheslia kuhniella] and other insects infesting flour-mills. 



