CONTRIBUTIONS FROM THE WISLEY LABORATORY. 27 1 



As turnips have been widely sown during August and September 

 to provide for a possible food scarcity, a description of this trap was 

 circulated to the gardening papers as soon as it was seen to be success- 

 ful. We have to thank Messrs. Wood & Sons for the assistance they 

 gave and for the illustration (fig. 56) which appears here, which was 

 sent to the gardening papers with our leaflet. Fig. 57 shows the three 

 rows first treated on the right and then the rows not treated till later, 

 with the trap standing in the first untreated row. 



