15 



which cracks as the bark expands with growth is unsatis- 

 factory and the bark of the peach is also very susceptible to 

 injury by such materials as coal tar. 



Tanglefoot proved most effective for the first year in 

 some tests by the New Jersey station, but by the second 

 year it had also effectively injured the bark upon the trunks 

 of the trees. Therefore, be cautious about painting any 

 material upon the trunks of young trees to repel borers and 

 do not draw conclusions from one season's results. 



Good results can be secured against the plum curculio 

 by spraying with arsenate of lead if favorable winter har- 

 boring places for the insect about the orchard are cleaned 

 up as it does not pass the winter in well cultivated orchards. 

 This insect is rather difficult to kill by arsenical poisons but 

 by using 3 lbs. of a good arsenate of lead paste to 50 gallons 

 of water it can be accomplished. A lead containing at least 

 15 percent of arsenic oxide is required for quick killing. 

 The first application of lead should be made just after the 

 petals fall from the blooms and the second when the calyx is 

 being shed or when the fruit is about the size of a green pea. 



The most common peach diseases occuring in New Jer- 

 sey are leaf curl, peach scab, brown rot, peach yellows and 

 little peach. 



Peach leaf curl is readily controlled by a lime sulphur 

 spray applied at a strength sufficient to control the scale. 

 Success also depends upon the time and thoroughness of 

 application. The disease attacks the leaves as soon as the 

 green tips appear beyond the bud scales and once inside, it 

 continues to develop and distort the leaves as they expand 

 and is then perfectly protected from any fungicide. Spray 

 before the leaf buds make any growth for effective control. 



Peach scab and brown rot are now readily controlled 

 by applications of self-boiled lime and sulphur. Peach 

 yellows and little peach are both causing some damage in 

 New Jersey but they appear to be slightly decreasing at 

 present. The nature of yellows is still unknown but it will 

 probably be determined within a few years, as rapid strides 

 are being made along plant pathology lines. 



However it is doubtful if this will help us very much at 

 first in its control. 



