4o8 Journal of Agriculture , Ticioria. [lo July, 191^. 



counterbalanced by the inability of the insects to make their escape in 

 flight and by their natural inclination to find a refuge during the day 

 somewhere close to the trees. 



Since they are unable to fly they must find their wav on foot to the 

 trunk of the trees and climb up to get at their food supplies. The return 

 journey is made before the next day. Hence the use of a bandage 

 around the trunk of each tree is a means of diminishing the pest. Crino- 

 line bands of plate tin in conjunction with bagging will be found useful 

 in this respect. The tin bands are cut about 3 to 4 inches in width and 

 sufficiently long to go around the trees and provide for a little lap. In 

 putting on such bands the uppermost erlge is fitted as close as possible 

 to the bark all around the trunk, thus pre\enting any beetle from squeez- 

 ing between it and the bark in going up. The lower edge is spread out 

 at some distance from the main stem. If the bandages are put on cor- 

 rectly and are of the right class of material, the beetles will fail to 

 negotiate them during the night, and numbers will be found in the early 

 morning underneath the bands. These should be collected and destroyed. 

 Bandages of bagging may also be used lower down than the tin bands as 

 a trap. Tanglefoot papers, strips of cloth or paper smeared with a 

 strong adhesive will often serve well, although it should be remembered 

 that all forms of adhesive bandages should be carefully tended and 

 frequently renewed as they are somewhat troublesome to keep in a proper 

 state of efficiency. 



Frequent cultivation close to the trees will also kill out numbers of 

 the pest, especially when in the larvae or pupa stages. Many of the 

 adult insects will also be injured and dislodged in this way. 



In conjunction with bandaging of the trunks and frequent cultivation, 

 spraying with arsenical compounds should be carried out. This latter 

 operation is probably the most effective and economic way of dealing with 

 this class of pest, and I would recommend the use of arsenate of lead for 

 the pur[oose. This may be obtained in prepared form, there being quite 

 a number of good brands on the market. In everv case, however, the 

 spray should be applied at high pressure and through a fine nozzle ; care 

 being taken to strike e\-erv part of the foliage. It is also ad\'amageous 

 to use strong solutions. 



If the grower is making up his own materials they should be pre- 

 pared in the following quantities : — 



12 ozs. acetate of lead, 5 ozs. arsenate of .soda, 50 gallons of water. 

 Prepare in the following way: — Dis.solve the 12 ozs. of acetate 

 of lead in 2 quarts of water and the 5 ozs. of arsenate of 

 soda in 3 pints of water in .separate vessels, wooden or 

 earthenware, for preference. Then pour the separate 



solutions into 50 gallons of water. 



This formula may ])e increased in strength up to double quantities. 

 I.e., 24 by 10 by 50 and used without fear of scorching the foliage. In 

 cases where the pest is verv bad it is advisable to use a strong solution. 



{To be continued .) 



One inch of rain over i acre equals loi tons of water. Therefore, the 

 weight of T point of rain to the acre is approximately i ton. 



At Rothamsted a soil growing barley lost 9 inches more water from the 

 top 54 inches than a corresponding bare fallow. 



