REPORT OF THE STATE ENTOMOLOGIST 1903 165 



cally the same as in series 1. The applications were confined 

 to portions of old appletrees except in cases of washes 5 and 6, 

 which were also applied to peachtrees. The scale infestation was 

 slight and fthe weather fair immediately following the treatment. 

 Appletree foliage was injured by wash 3, which caused the leaves 

 to shrivel and fall off, and 4 burned them slightly. Wash 5 

 burned tips of peach leaves, and 6 had the same effect. Numbers 

 3 and 1 adhered very well for three weeks. 



Series 4. The two washes used in this experiment w^ere applied 

 Aug. 21 and observations made from Aug. 27 to Oct. 20. Eela- 

 tively large amounts were used and the applications madle im- 

 mediately after preparation. The cyclone nozzle used gave a 

 somewhat coarser spray than the atomizer employed in the first 

 three series. Pear, plum, peach and mulberry trees were used 

 in this experiment and most of them were badly infested. The 

 foliage was in good condition, the w^eather fair and remained 

 so for a few days following the spraying. Plum and pear leaves 

 were injured by wash 1, particularly in the case of a pear where 

 the treatment was specially thorough. This latter dropped its 

 leaves, while another, which received less of the mixture, did not, 

 though the foliage was evidently injured. AYash 2 seriously 

 injured peach leaves and caused slight burning of plum and mul- 

 berry foliage. Wash 1 adhered very well and was present in 

 thick layers Sep. 8 and traces of color could be detected Oct. 20. 

 The same was true to a lesser extent of wash 2. Oct. 20, number 

 1 had destroyed 755?^ of the scale on a peartree, and the foliage 

 was slightly burned. A number of limbs were dying on the 

 tree, which had dropped its lower foliage and on which the scale 

 was entirely dead. Only about 15fc of the scale had been killed 

 on the living branches. Wash 2 killed 40^ of the scale on one 

 tree and -about 85/^ on the other, which latter was in very bad 

 condition. 



Series 5. Six washes were applied Sep. 4, and observations 

 made at intervals from Sep. 6 to Oct. 20. Small amounts of 

 the washes were used and the same nozzle was employed as in 

 series 4. Apple foliage Avas slightly burned by washes 1, 2 and 3, 



