518 NEW JERSEY AGRICULTURAL COLLEGE 



one of the usually reoommeiided washes that has not achieved ex- 

 cellent results in some hands and in some localities, and, on the 

 otlier hand, there is not one that has not failed as completely at 

 other times in other places. Of course, in many instances the 

 causes of individual failures were obvious or discoverable, but in 

 some others the result or lack of effect is totally inexplicable. On 

 a subsequent page are given the results of Mr. Dickerson's obser- 

 vations during his tours through the orchards of the State. On 

 the whole it may be said that the scale is under better control than 

 ever before.* 



The oyster-shell hark-lovse comes next in importance, and in a 

 few instances has caused as much or even greater mischief than 

 the pernicious scale. In an apple orchard in Burlington county 

 this insect is actually more dreaded than the other and seems more 

 difficult of control. It is on shade trees, however, that it is usually ■ 

 troublesome, and on shrubs in gardens, its range of food-plants 

 standing second only to that of its pernicious ally. Nor is it con- 

 fined to any one section of the State ; reports from Warren and 

 Sussex counties being as frequent as those from Burlington and 

 Cumberland, although the infestation is usually on different 

 plants. Insecticide applications are rarely made as against this 

 insect, and that it does not spread faster and does no more injury 

 is due to natural checks entirely. 



The Scurfy Scale attracts attention here and there, but is rarely 

 either ver\^ abundant or troublesome. Its occurrence during the 

 past season on certain shade trees in New^ark is exceptional, and 

 apparently there was some difficulty in dealing with it. 



The Rose Scale occurred in notable numbers in a few localities, 

 but chiefly in gardens and not on the berry plants that are some- 

 times so badly infested. 



The Cottony Maple Scale reached the highest point in- its de- 

 velopment in 190.5, and, as predicted in the previous report, its 

 natural enemies o{)taincd complete control of it in those localities 

 where it appeared first and in the greatest numbers. There is no 

 doubt that the little lady-bird beetle, Hyperaspis signata, deserves 

 the chief credit for reducing the insect to normal proportions, and 



* In a very few cases the scale has disappeared from badlj-infested trees 

 where no treatment at all has been made, and this has raised hopes that it 

 might do so more generally, but there is no real evidence that this desirable 

 consummation is anywhere near at hand. 



