. Annual report of the Fruit Growers' Association of Ontario, 1902 . rio, and in many places com-pletely destroyed all clover left for seed. Even that which was pasturedup to June 20th was destroyed, according to some reports. Here, again,farmers must co-operate. All should cut or pasture their clover until the20th of June. In many respects, Wireworms, Figs. 42 and 43, may be considered oneof the most injurious insects which attack farm crops. The extent of theravages is difficult to compute, for in some localities they are almost absent,but in others they are very abundant. On account of thei
. Annual report of the Fruit Growers' Association of Ontario, 1902 . rio, and in many places com-pletely destroyed all clover left for seed. Even that which was pasturedup to June 20th was destroyed, according to some reports. Here, again,farmers must co-operate. All should cut or pasture their clover until the20th of June. In many respects, Wireworms, Figs. 42 and 43, may be considered oneof the most injurious insects which attack farm crops. The extent of theravages is difficult to compute, for in some localities they are almost absent,but in others they are very abundant. On account of their habit of working below the surface of the ground,no reliable method has been devised for their destruction, or for the pre-ventix)n of their attacks. In fields which have been kept for several yearsin sod, wirewcrms are almost certain to multiply. When the sod lands are broken up, thet^ worms will be found in almost every stage of development. Some are very young and willrequire two cr more years before becoming mature ; some are a year old ; some two years Fig Clover-seedMidge: {a) larvahighly magnified; b)head retracted, stillmore highly magni-fied. (Riley.) i9o:s ENTOMOLOGICAL SOCIETY. 65 and others nearly mature and perhaps entering the pupa stage. It is evident then that thebreaking up of the land will destroy but a small number of all the wireworms in the soil. Ifthe ploughing is done in the fall, and the land is kept well stirred until winter sets in, manypupae will be destroyed ; but the grubs will be but slightly injured. The roots of the grassesturned under may satisfy their appetite the following season, and the crops may not suffermuch. In the second season, however, these supplies of food are exhausted, and the roots ofthe growing crops are called into requisition. Hence the common complaint that wirewormsare often more destructive the second season after the sod is ploughed under. It behoves thefarmer, therefore, to put in a crop which is specially
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