284 



Insecticides 



Editorial 



Spruce fir 



' Spruce gall ' 

 Hardy Fruit Garden 



Pear trees on walls 



Editorial 

 Aphis and red spider on 



Roses 



The flower garden 

 Fruits under glass 



Red spider 

 Pubhc parks and gardens 



Tree pests in London 



there are some aphides in the trusses add 2 lb. of soft 

 soap to the 25 gallons of wash. p. 336, 17. 5. 13. 



Spray in winter with a wash of 3 lbs. soft soap, .5 

 gallons water, and 1 pint of paraffin thoroughly 

 mixed, p. 336, 17. 5. 13. 



Black and green aphides wUl soon make an appearance 

 on the ends of the shoots and should be destroyed by 

 syringing with msecticide. Leaves that are infested 

 with caterpillars or ( ? of) the Pear moth, should be 

 gathered and burned, p. 367, 31. 5. 13. 



To destroy aphis, it is best to fumigate with a nicotine 

 preparation. For red spider, the leaves may be 

 sponged with a httle soapy water — half an ounce of 

 soft soap to one gallon of water — mixed with half a 

 pound of flowers of sulphur and kept stirred. Or 

 flowers of sulphur may be applied dry with the Malbec 

 beUows. p. 375, 31. 5. 13. 



Syringe roses with an insecticide at least once a week to 

 keep aphis in check, p. 383, 7. 6. 13. 



The trees should be syringed frequently with an in- 

 secticide, p. 383, 7. 6. 13. 



The Goat moth {Cossus ligniperda) is far more common 

 over the London area than is generally supposed, and 

 this may also be said of the Wood Leopard moth 

 {Zeuzera cescuH), both of which attack the Elm, Poplar, 

 Ash and Oak. The larvae of both moths, which are 

 deposited on the bark of the tree in July or August, 

 tunnel into the wood and do much damage to the 

 timber as well as the health of the tree. Placing 

 cyanide of potassium in the hole and closing the aper- 

 ture is the best method of destroying the caterpillar, 

 though we have used gas tar in a similar way with good 

 results. Dislodging the caterpillar by means of a 

 bent wire has been successfully carried out. Lime 

 trees all over London are attacked by the caterpUlar 

 of the Lime Loopcr moth (Hyhernia defolaria), whUe 

 the Thorn fly, an Aphis, attacks whole hedges of the 

 Hawthorn as well as specimens standing singly. 

 Sponging with tobacco water is to be recommended for 

 the latter, and for the Linxe trees caterpillar bands of 

 any sticky substance painted around the stems will pre- 

 vent the insects ascending to the branches. Red spider 

 {Tetranychus telarius) is another formidable insect 

 pest that not infrequently attacks the leaves of several 

 species of hardwooded trees, and is often the cause of 

 death of the Ivy, particularly when grown as a ground 

 carpet. The leaves turn a rusty-brown colour, crumple 



