May 14, 1890.] 



Garden and Forest. 



239 



The Greendale Oak. — See page 233 



u'i 



as near the glass as possible. I take the sashes off whenever 

 the weather permits. For mildew I know of no remedy except 

 sulphur, and I use black sulphur for look's sake. To air 

 evenly is the best way to guard against mildew. 



If the hose is applied at every favorable opportunity there 

 is little danger of the different kinds of Aphis getting a foot- 

 hold ; except, possibly, the black variety. Dalmatian powder 

 or Tobacco -dust is generally a sufficient remedy. After 

 housing a small, reddish brown, hairless caterpillar (or 

 what seemed to me to resemble a small cut-worm) eat the 

 centres of the flowers. Being scarcely thicker than an ordi- 



nary knitting needle and only one-third of an inch long, it 

 was some time before I found these pests secreted amongst a 

 few curled up dead leaves at the base of the plants. The 

 stock plants were stored away until time for taking cuttings, 

 which were placed in an ordinary cutting-bed, when some of 

 the same enemies began to work on them, and gave me 

 enough to do to keep them down. Their numbers increased 

 rapidly, and spread on many other plants. Professor Smith, 

 of the New Jersey Agricultural College, informs me that the 

 pest is the larvae of some nocturnal moth. 



Wellesley, Mass. T. D. H. 



