148 THE FRUIT GROWER'S GUIDE. 



Aphides. More than one species of aphides infests the cherry. Green fly is most 

 abundant on trees grown in the open, but the black fly, Aphis cerasi, Vol. I,, page 

 258, is the most hurtful. It is conspicuous by its black hue and filthy secretions, which 

 clog the leaves and spoil the fruit. Measures to be taken for the prevention and 

 destruction of aphides are given in Vol. I., page 259. It is very important that the 

 trees should not be neglected. Diligent attention before the flowers expand so as to 

 have the trees perfectly free of aphides is paramount in securing a good set and fine 

 cherries. 



Caterpillars. The larvaa of some moths infest the cherry, devouring the leaves and 

 young fruit. One of the most troublesome on trees against walls and under glass, is the 

 apricot moth, Tortrix angustionora, often eating the cherries. See page 90 for treat- 

 ment. The caterpillars of the winter moth, Cheimatobia brumata, and those of the 

 mottled umber moth, Hybernia defoliaria, devour the leaves and young fruit voraciously, 

 and must be destroyed by Paris-green sprayings, as described in Vol. I., page 293. 

 The larvae of the small ermine moth, Hyponomeuta padella, occasionally attack cherry 

 trees, burrowing in the leaves during the early spring, but in May they show them- 

 selves on the web which they spin in company, and soon defoliate a large tree. For 

 means of destruction see Yol. I., page 286. 



Red Spider. Except in dry seasons, soils, and situations, the cherry is little infested 

 by red spider outdoors, but under glass there is always danger of attack by the 

 diminutive pests. Trees outdoors that are subject to the attacks of red spider should 

 be well supplied with water and liquid manure in dry weather, mulching over the roots 

 so as to conserve the moisture. The foliage also should be well washed, using soapy 

 water in the early stages, following with clear water, but soapy solutions must not be 

 used after the fruit commences to ripen, or it will leave a deposit on the cherries, greatly 

 detracting from their appearance, and clear water used too long will cause them to 

 crack. Eemedies in other respects may be the same as those devised for " Eed Spider," 

 Yol. I., page 270. 



Scale. This seldom attacks trees outdoors ; those, however, grown under glass are 

 liable to be infested by brown scale, the same that attacks the peach, and is best destroyed 

 by a winter wash of soft soap, 3 or 4 ounces to a gallon of water, using a brush discreetly. 

 During the growth of the trees it is safest combated with petroleum emulsion, or resin 

 compound. See " Scale," Yol, I., page 273 ; also " Peach Diseases." 



Slug-worm (Selandria atra, Stephen and Westwood) (Tenthredo cerasi, Linn and 



