28 The Horticulturist's Rule- Book. 



Grape (Phylloxera), continued. 



in European countries, as the European vine is particularly 

 subject to attack. 



Remedies. There is no reliable remedy known. Burn 

 affected leaves. Bisulphide of carbon poured in holes in 

 the ground, which are quickly filled, is sometimes effective. 

 Carbolic acid and water used in the same way is also 

 recommended. 



ROSE BEETLE. See under Rose. 



SNOWY CRICKET. See under Raspberry. 



THRIP or LEAF-HOPPER (Erythroneura vitis, Harris). In vari- 

 ous stages, one-tenth inch or less long ; feeding on leaves, 

 causing them to appear scorched. 



Remedies. Sticky fly paper secured to a stick and car- 

 ried over the vines, while another person scares up the in- 

 sects. Attract to lights at night. Kerosene emulsion. In 

 houses, tobacco smoke, pyrethrum poured upon coals held 

 under the vines, syringing with tobacco water or soapsuds. 

 Fumigation in the field should be done before the insects 

 develop wings late in July or in early August (in the 

 north). Rake ground clean about vines late in fall in 

 order to expose insects to the weather. It has been found 

 in California that thrips can be greatly lessened by feed- 

 ing off the leaves with sheep, soon after the grapes are 

 picked. 



Lawns. ANTS (Formica sp.). Insects burrow in the 

 ground, forming "ant-hills." 



Remedy. A tablespoonful of bisulphide of carbon, 

 poured into holes six inches deep and a foot apart, the 

 holes being immediately filled up. 



Leaf Grumpier (Phycis indigenella). Larva, brown, wrink- 

 led, found on the inside of leaves, which it brings together 

 in masses and attaches them to each other and to the twigs 

 by means of silken threads. The next season young 

 worms appear from the mass and feed on the new crop of 

 leaves. 



Remedy. Gather the masses and burn them. 



