376 Insect Pests. 



The larvte fall readily to the ground if the tree is jarred, especially 

 when they are rolled up and not feeding. This enables us to cope 

 with this pest mechanically, by jarring them off on to tarred sacks 

 or any other convenient way in which they may be collected. 



Arsenate of lead may be used as a spray or the more conventional 

 hellebore wash. Fortunately, feeding on the under surface of the 

 leaves, they are more readily poisoned than the slugworm, as the 

 poison is not so easily washed off by rain. 



References. 



(1) Cameron, P. 'A Monograph of British Phytophagous Hymenoptera,' 



vol. II., p. 33 (1885). 



(2) Theobald, F. T". Report on Economic Zoology for the year ending 



April 1st, 1905, pp. 18-21 (1905). 



THE PLUM FRUIT SAWFLY. 



{Hoiilocampa fulvicornis. Klug.) 



The plum has long l)een observed by growers and gardeners to 

 be attacked by a large maggot, which we now know to be the 

 Hoplocampa fulvicornu of Klug, the Tcnthrcdo morio of Sclnnidberger 

 and Kollar (4). 



During the last ten years the ravages of this sawfly have certainly 

 become more marked than formerly. 



Frequent complaints have been sent me from Worcestershire, 

 where in the Evesham district in 1906 considerable damage was done 

 to several varieties, including greengages. 



From Eoss Air. Getting wrote first in May 1905, complaining 

 of the damage, and sending small plums many of which showed the 

 roimd exit hole of the larva (Fig. 249). 



In June towards the end of the montii he found many pierced 

 fruitlets on the ground, but all the grubs had left them (1). In June 

 1907 he wrote again complaining of a still further attack and on more 

 trees. In 1889 a Victoria plum at Boughton was examined, in which 

 every fruitlet had been struck ; since that year the Plum Sawfly has 

 not occurred in the locality. In 1907 a prune on the South Eastern 

 Agricultural College plantation was badly infested, no trace of it 

 had been seen before anywhere near. 



Ormerod (2) records it from Urchester in June, the observer 

 mentioning that the plums were heavily attacked, quite half the 

 crop being injured, also from the Toddington Fruit Plantations, and 

 also from the same locality in which complaints were made to me (3) 



