94 



worker, but care is necessary as the insects readily fall off when 

 alarmed either by too strong a light or by jarring the bushes 

 or canes. No insecticide has proved of any use against the 

 weevils when in the soil but spraying the plants with a poison 

 has not been properly tested. Suggestions to this end will be 

 sent on request. 



(b) In the case of greenhouses, the only complete treat- 

 ment is to clean out the house and repot the stock, shaking 

 out the soil from the roots and killing the grubs. The pest 

 can be kept in check by searching plants and stages carefully 

 at night (especially in spring and early summer) for the adult 

 weevils. Watering the plants with insecticides and mixing 

 insecticides with the soil in the pots have given variable results 

 but no treatment of this nature has yet been sufficiently 

 standardised to justify a recommendation in a leaflet. Where 

 a grower has the time and inclination to experiment, an 

 insecticidal treatment is well worth consideration. 



THE VAPOURER MOTH. 



(Orgyia antiqua). 



VAPOURER MOTH : a. Male; b. Female; c. Cocoon, surrounded by eggs; 

 d. Caterpillar. 



The caterpillars of this moth attack the foliage of a great 

 variety of plants, including most of the fruit trees and a large 

 variety of forest trees both hardwoods and conifers. They' 

 also devour herbaceous plants in gardens and greenhouses, and 

 may in fact be described as general feeders. 



From May to September the caterpillars may be found ; from 

 Tuly up to.iind including October the adult moths appear. 



