6o4 NEW JERSEY STATE AGRICULTL'RAL 



cation was a drench to see whether on a single tree the effective- 

 ness of an appHcation could be determined by the difference be- 

 tween the sprayed and the iinsprayed sides. 



June 1 8th examined the trees casually and found crawling 

 larvse or recent sets only on trees 8, 38 and 40. Made up two 

 solutions of caustic soda (97°-98°) to test its effect on foliage; 

 the first at the rate of i pound in 4 gallons of water, the other at 

 the rate of i pound in 8 gallons of water. With the stronger 

 mixture sprayed trees 17 and 39, covering all foliage as well as 

 the wood to the base of the ground ; on tree 40 sprayed one 

 branch only. With the weaker mixture sprayed t-ee 36 completely 

 and certain branches on trees 8 and 33. In addition sprayed two 

 raspberry bushes with the stronger solution and one arm of a 

 grape vine with the weaker. Used the "Utica Blizzard Sprayer" 

 for these applications, and found that it required more work to 

 obtain the desired result than any other piece of apparatus it was 

 ever my ill fortune to get hold of. 



June 19th made a closer examination as to scale conditions and 

 found some on almost every tree with groups of larvae beneath 

 them, ready to emerge, but there were few that were actually 

 moving. The sprayed foliage was twice examined during the 

 day. On the raspberries more than half the leaf tissue was 

 actually killed with probability of further extension ; on the grape 

 foliage the weaker mixture had done little apparent injury. On 

 tree 8 the leaves on the sprayed portion were distinctly spotted 

 as were also the soft shoots. On tree 33 both foliage and fruit 

 were badly spotted, but there was no apparent harm to the shoots. 

 On tree 36. both foliage and shoots were badly spotted and some 

 of the leaves and tips are entirely killed. All the above were 

 treated with the weaker solution. 



Of those to which the stronger solution was applied tree 17 had 

 the foliage badly spotted and some of the tips killed. Some of 

 the tender shoots were also black spotted, but, on the whole, 

 the injury was less than had been anticipated. On tree 39 the 

 leaves were dry and brown around the edges, but it was impos- 

 sible to estimate the full extent of the injury. On tree 40 the 

 sprayed foliage was black spotted and some of the tips were 

 killed ; yet the damage was not really serious. 



June 30th, Trees 2, 18, 21, 30 and 38 were thoroughly, and 

 tree i partly sprayed with 'Tyrol Tree and Plant Spray", i parr 

 to 40 of water, using the "Mistry" nozzle. The weather was fine 

 when the spraying was done, but a shower came up in the evening 

 and it rained more or less during the night. 



