Stem Eelavorm. 



473 



infested onion crops, deep ploughing should follow in fields, 

 with the careful removal of pieces of bulbs and leaves. In 

 allotments and gardens, deep digging, or, better still, 

 trenching, must follow infested onions, and all refuse must 

 be cleared away and burnt, which is comparatively easy in 

 small plots. During the season when onions are pulled for 

 use, and when onions are stored and taken from the store 

 from time to time, all rejected parts must be burnt as the 

 onions are used. Onions should not follow onions on the 

 same plot for some time after an attack. Affected flower 

 bulbs must be at once dug up and burnt. 



It is not sufficiently realised that precaution and care 

 are as necessary to be observed with regard to this and many 

 insect infestations, as in epidemic disorders. 



Remedial measures in attacks of eelworms are, and must 

 be, from the microscopic nature of the nematodes, and their 

 habit of living within the tissues of their host-plants, mainly 

 of an indirect character, and consist in manurial applications 

 to force the infested plants along, or to applications of an 

 alterative tendency, to alter their juices and make them less 

 suited to the parasitic invaders. For clover crops thus 

 infested, the best manures or alteratives have been found to 

 be mixtures of sulphate of potash and sulphate of ammonia. 

 A mixture of 3 cwt. of sulphate of potash and i cwt. ot 

 sulphate of ammonia proved to be a very good remedy. 

 Another mixture of i cwt. of sulphate of iron, i cwt. of 

 sulphate of potash, and i cwt. of sulphate of ammonia, was 

 nearly as good, checking the infestation and helping the 

 plants on. Four cwt. of dissolved bones mixed with 2 cwt. 

 of sulphate Ox^ potash per acre form a valuable dressing for 

 infested clover. Another mixture found to be useful was 

 composed of 4 cwt. of kainit, 2 cwt. of sulphate of iron, and 

 3 cwt. of superphosphate. 



Oat plants suffering from eelworms have been much benefited 

 by a composition of 5 cwt.. of kainit, i| cwt. of sulphate of 

 ammonia, and i cwt. of sulphate of iron ; also from a mixture 

 of 2 cwt. of sulphate of potash, and 2 cwt. of sulphate of 

 ammonia. An application of i cwt. of sulphate of iron, 

 3 cwts. of nitrate of soda, and i cwt. of sulphate of potash, 

 likewise had good results. 



