604 Insect, Fungus, and other Pests. [nov., 



" Leaf vScald " is not caused by a -fungus, but is a disease of a 

 physiological nature, and is probably found principally where 

 trees are on grass. It has been shown that Cox's Pippin and 

 some other kinds of apple are much injured by growing amongst 

 grass. As an experiment it would be well to try removing the 

 grass from round a few trees as far as the branches extend. 



Diseased Peaches. — Peaches from Faversham were found to be 

 affected with the fungus Penicillium glaucum, Link. This is a 

 wound-parasite, the spores gaining access to the fruit through 

 a wound. Such wounds are made in the first instance by 

 "green fly " and other minute insects which more especially 

 puncture the thin-skinned varieties of fruit. A judicious use 

 of insecticides will prevent recurrence of the injury. 



Fungus on a Lawn. — Specimens of a fungus which was 

 spreading on a lawn were identified as Marasmius oreades, Fr., 

 the fairy-ring fungus. The turf should be thoroughly drenched 

 with a solution of sulphate of iron — i lb. in 3 gallons of water. 

 This treatment will be most effective if applied when the soil is 

 wet from previous rain. (See Journal, December, 1907, p. 537). 



Diseased Celery. — Celery from Wimborne was found to be 

 suffering from a bad attack of the fungus Septoria petroselini 

 var. apii, B. and C. All badly diseased plants should be care- 

 fully removed and burned. From slightly affected plants the 

 diseased leaves only need be removed. The rows should then 

 be sprayed with a solution of potassium sulphide, beginning 

 with a strength of 1 oz. of sulphide in z\ gallons of water, and 

 increasing the strength as long as the leaves are not injured. 



Diseased Potatoes. — The issue of the Destructive Insects and 

 Pests Order of 1908, which rendered the notification of Black 

 Scab or Warty Disease (Chrysophlyctis endobiotica, Schilb) com- 

 pulsory, and the alarm caused by the description of the 

 injurious effect of this disease, induced a large number of 

 persons to send up specimens of potatoes to the Board for 

 examination. Although a considerable number of these 

 specimens were found to be attacked with this disease, many 

 were affected in quite different ways. A large number, sent 

 np from nearly all parts of the country equally, were marked 

 with a surface scab of uncertain origin. The skin in these 

 cases is marked with a shallow rusty- looking spot of irregular 

 shape, sometimes covering a large part of the potato. It is 1 



