H 



ORCHIDS 



Insect and other Pests. 



in colour. As the specific name suggests, it perforates 

 the stems (Fig. 2), and, once inside, tunnels in various 

 directions, causing the plant attacked to have an un- 

 health)' look. The grub (Fig. 3) is white and footless. 

 Plants exhibiting signs of decay, and \\'hose stems are 

 found to be perforated in the \va}' shown in the portion 

 of plant illustrated, should have such portions removed 

 and burned. The check recei\-ed will be nothing to the 

 damage that would ultimatel)- occur were the insects 

 allowed free play. In bad attacks Dendrobiums are some- 

 times killed. This Beetle does not feed exclusivel}' upon 



jfl' pcrmisiion of the Board of AgrUidturc. 

 Fig. 2. Dendrobium Beetle {Xyleborus perfomns). 



I and 2, Beetle highly magnified ; 3, Insect, natural 

 size ; 4, Infested stem, with hole made by Beetle. 



Fir,. 3. Grub of 

 Dendrobium 

 Beetle in Or- 

 chid Stem. 



Orchids ; in the sugar-growing countries it is destructive 

 to the canes. 



Outside the class lusecta we have the Woodlice, which 

 are extremely partial to the young roots of Orchids. Like 

 the Cockroaches they are nocturnal, and like them, too, 

 they are best destroyed by means of phosphorus paste.' 

 The Red Spider may be fought by fumigations of XL All 

 insecticide, and by sponging the foliage. 



Slugs and Snails are at times troublesome, and especially 

 the Garlic-scented Snail that is so commonly introduced 

 with the sphagnum. These pests will gnaw through the 

 flowers should they escape the vigilant ej-e of the gardener 



