42 



in. of the band and should be so applied as to form hori- 

 zontal ridges rather than a uniform smooth surface, since it- 

 will then remain sticky for ;\ longer period. Compounds which 

 are thin and liable to run should be applied mainly to the upper 

 part of the band so as to prevent the drops from running "off 

 on to the bark. 



It is not always easy to make a neat job of applying the 

 adhesive to the paper bands. If the selected substance be of a 

 birdlime-like consistency the operator's hand is quite the best- 

 implement. The method is to " slap " the substance on to 

 the band and draw the hand round the circle. If using the 

 hands in this way be objected to, shaped pieces of wood may 

 be obtained for the purpose. 



A good material will retain its sticky qualities for many 

 months, though it may be necessary to scrape the bands 

 occasionally to expose a fresh surface to the air. The bands 

 should be examined periodically to find whether they are still 

 sufficiently " tacky " to fulfil their object, and a fresh coating 

 of composition must be put on if necessary. 



(2) Spraying. Lead arsenate has been found most satis- 

 factory for this purpose. It is usually obtained in the paste 

 form. 4-5 lb. of paste being added to 100 gallons of water. 

 The spray should be applied as soon as the leaves begin to 

 appear (before the blossom opens) and, if necessary, a second 

 application may be made after the petals have fallen, but in HO 

 case should lead arsenate be used on open blossom, owing to 

 the danger of poisoning bees. 



A nozzle giving a fine, misty spray is most suitable, and the 

 folia-ge should not be drenched so that the liquid drops off the 

 tips of the leaves. Lead arsenate may be used in conjunction 

 with either Bordeaux mixture or lime sulphur if it is necessary 

 io deal also witTi fungus diseases as for instance Apple Scab 

 (SPP Leaflet No. 131) or Brown Rot (see Leaflet No. 86).* 



(3) Forest trees such as oaks should never be allowed to 

 overhang the margins of fruit plantations for Winter Moth 

 caterpillars will fall off the oaks and crawl up into the fruit 

 trees. As these caterpillars also feed on hawthorn and nut 

 bushes in hedges, the hedges should be kept well trimmed, 

 and it is a good plan to instruct workers when spraying with 

 lead arsenic to give also a light dressing to the hedges when- 

 ever they reach the end of a row. 



* Obtainable from the Ministry and also included in Sectional Volume 

 No. 1, price 8d. 



