ii4 PROTECTION OF WOODS AGAINST 



i. Collection and destruction of larva, pupa, and perfect 

 insect. With a knowledge of the life history of the insect, 

 the woodman will choose that stage in which it is easiest to 

 destroy it. 



a. Preparation of traps. A few dead or sickly trees are 

 left standing in the woods, or felled logs are left here and 

 there. These are visited periodically, and when found to be 

 full of the insects they are burnt. 



3. Grease bands may be put round the trunk of trees to 

 catch insects, such as the winter moth, which climb up from 

 the ground and cannot fly. 



4. In orchards or in nurseries of specially valuable species, 

 spraying with an insecticide may be tried. Paraffin emulsion 

 is often very successful ; to make it, dissolve one pound of 

 soft soap in half a gallon of boiling water, add one gallon 

 of paraffin oil, and churn this well by using a garden syringe 

 till the oil is well mixed into the soapy water. For use, 

 dilute by gradually stirring in twelve to fifteen gallons of 

 water. 



Other measures will be indicated when dealing with each 

 insect. 



Although very little can be done by the woodman, it is 

 comforting to know that parasitic insects, diseases, birds, 

 damp and cold weather, kill off myriads of injurious insects 

 which would otherwise multiply enormously. It is not 

 possible in this book to enter into great detail regarding the 

 various insects, but the following short notes deal with a few 

 of the worst to be found in the British woods. Further details 

 about some of these pests can be obtained in the leaflets issued 

 by the Board of Agriculture, which are given away free. A 

 list of these should be obtained by the woodman, who can 

 then ask for those leaflets he requires. 



