4 REPORT ON INJURIOUS INSECTS FOR 1905. 



It is very important to remember that the larvae can remain 

 in dry soil or in dried vegetable matter for a considerable length 

 of time in a state of suspended animation, having the power to 

 resume active life after even two or three years. 



PREVENTIVE AND REMEDIAL MEASURES. 



This is an exceedingly difficult pest to deal with. In gardens 

 or on small areas all refuse of diseased plants should be burnt, and 

 the soil liberally treated with gas lime, or saturated three times at 

 intervals of a fortnight with one part of carbolic acid in twenty 

 parts of water. Where either of these methods of treatment have 

 been employed, the soil so treated should be allowed to remain for 

 six or seven weeks before being used again. 



On larger areas, as for instance on red clover or onion crops, 

 as long an interval as possible should be allowed before the same 

 crop is grown again. Land known to be infested should also 

 receive a liberal dressing of gas lime. 



Good results have frequently been obtained by grazing sheep 

 on the land. 



WHITE WORMS. 



? Fridericia leydigi, Vej. 



A correspondent forw r arded Narcissus bulbs injured by the 

 stem eel worm (T ylenchus devastatrix}. A number of larger worms 

 were noticed and forwarded to Mr. A. E. Shipley, F.R.S., who very 

 kindly reported that, in the opinion of Dr. Vejdovsky, they were 

 almost certainly Fridericia leydigi, Vej., but he could not be 

 absolutely certain, as they were immature. 



WOODLICE. 



Several correspondents have sent in specimens of different 

 species of woodlice from greenhouses and conservatories, as well as 

 from the open garden. 



By far the two commonest species are Oniscus asellus, Linn, 

 and Porcellio scaber, Latreille. In addition to these, the follow- 

 ing species have been received: 



Trichoniscus pusillus, Brandt. 

 Trickoniscus roseus, Koch. 

 Platyarthrus hoffmannseggi, Brandt. 

 Porcellio pictus, Brandt and Ratzeburg. 

 Porcellio rathkei, Brandt. 

 Metoponorthus pruinosus, Brandt. 

 Cylisticus convex us, De Geer. 

 I shall be very pleased to receive further specimens. 



PREVENTIVE AND REMEDIAL MEASURES. 



In conservatories and greenhouses, trapping is one of the most 

 successful measures I know of, and for this purpose little heaps of 



