10 Oct., 1916.] 



Insect Pests of the Gardens. 



605 



&c., are found to be affected with the grub of this fly, no time should 

 be lost, and all infected fruit should be gathered up and boiled. 





Tiger Moths. 



The dark-striped tiger moth and the light-striped tiger moth are two 



native moths, which, in the caterpillar state, are very destructive to all 



kinds of plants — dahlias, carnations, sweet peas, pelargoniums, (fee, and 



all kinds of vegetables, especially beans, are destroyed by them. The 



caterpillars are hairy, and 

 may frequently be seen in 

 large numbers. As a rule, 

 birds do not seem to be 

 partial to these insects. 

 The eggs are often de- 

 posited amongst weeds on 

 neglected headlands. When 

 hatched, the young feed 

 ravenously. The cocoons 

 are deposited near the tus- 

 socks, and are partly 

 covered with grass. The 

 larvfe feed mostly by night, 

 and hide by day. As this 

 pest tlireatens to become a 

 serious one, prompt action 

 must be at once taken to 

 stamp it out. Excellent re- 

 sults can be obtained from 

 the arsenate of lead spray. 

 This spray mixture is 

 cheap, and there is no diffi- 

 culty in mixing it. The 

 ar.senate of lead is placed 

 in the pump, the water 

 added, the nozzle of the 

 pumi> placed inside the 

 pump, and the mixture of 

 arsenate of lead and water 

 forced through the nozzle 

 for a few minutes till the 

 mixture is complete. In 

 motor pumps, the agitator 

 in the pump mixes the 

 material. 



Fig. 21. — Dark-striped Tiger Moth 



(DiacriNia carirscrns. l.c (!.|. 



Light-striped Tiger Moth 

 (Articcs ylatigtn/i. IJiitk'r). 



Thrips. 

 The minute insects known as thrips are among the most notoriously 

 injurious pests to cereals and other plants — such as roses, dahlias, carna- 

 tions, tomatoes, beans, onions — known. They are difficult to deal with, 

 on account of their habit of crawling into the centre of the flowers of 

 roses, fruit trees, raspberries. &c., and sucking the juices out of the 

 petals. This causes tliem to turn a dirty-brown colour. Tn some 



