526 



Bulletin 78. 



that might be devised to combat them. The soil was also very loose and 

 uneven, and had been cultivated into ridges in which the plants had been 

 set ; and we purposely had the cards put on with only the care that an inex- 

 perienced person would take. Although the conditions were thus against 

 the success of the method, yet Mr. Reeve reported in August that he had cut 

 327 heads from the two rows on which the cards were put ; the west half of 

 the 3rd row gave 77 heads, and the west half of the 7th row 60 heads (chickens 

 had destroyed about 25 plants on the end of these half rows) ; from the east 

 half of the first row he had cut 100 heads, and from the east half of the 4th 

 row 90 heads. The two untreated rows together produced but 90 heads. 



The experience of Mr. Smith given in his letter above, well 

 illustrates the importance of proper conditions and proper care in 



applying the cards. 

 He also writes us on 

 this point: "If the 

 soil is very light and 

 loose, care must be 

 taken that the plants 

 arenot pressed down 

 too deeply so as to 

 form a cup or dish 

 around the plant. 

 . . If the land is 

 very soft, the better 

 plan would be to roll it 

 before setting the 

 plants." To further 

 impress the idea of 

 properly putting on 

 the cards, we have 

 introduced figure 16 which shows a card properly applied at a / 

 and one carelessly put on at b, under which a female fly could 

 easily crawl and lay her quota of eggs near the stem. With a 

 little practice, the cards can be applied properly just as easily and 

 as quickly as it can be done carelessly. Growers will soon learn, 

 as have Messrs. Smith Brothers of Wisconsin, that the cards, 

 to be effective, must be properly applied ; and that when the 

 cards are thus applied, they are very effective. 



Our experience satisfies us that these cards will afford almost 

 complete protection to cabbages and cauliflowers from the Cab- 



FiG. 16. — a. Tarred Paper Cai'd property put 



on ; b, a card caretessly applied that wilt 



ttot prevent. 



