48 



of 8 inches, and carefully sifted; all insects were removed, and placed 

 in a broad, shallow box, and allowed to remain in the sunlight 15 min- 

 utes before being counted. The count resulted as follows: 



.Results of experiments with carbon bisulphid in destroying grubs and pupse of Fuller's 



rose beetle. 





Grubs. 



Pupee. 





Total. 



Dead. 



Alive. 



Total. 



Dead. 





55 



42 

 36 



43 

 35 

 34 



13 

 7 

 2 



1 

 

 2 



1 











2 







Several forms of insects were found, including young sand crickets 

 and wireworms in different stages, and these in every instance were 

 dead. A second investigation later on failed to show any sign of insect 

 life in the row that had received a dose of one-third of an ounce every 

 lineal 18 inches. The cost of treating at this distance, which was 

 apparently complete in its effects, would be approximately 10 cents for 

 75 feet of row. 



This is probably the first reported instance of this insect attacking 

 the roots of berry plants. However, the writer is of the opinion 

 from evidence gathered that it has been working unrecognized upon 

 the roots of strawberry in different parts of this county for some time. 

 Fortunately, the natural spread of the pest in berry fields will be slow, 

 owing to its inability to fly, and every effort should be made to take 

 advantage of this condition, and to prevent its distribution by other 

 agencies, by discouraging and preventing, where possible, the sale or 

 removal of young plants from infested areas. It will prove practically 

 impossible to detect with certainty (such as is required on other forms 

 of nursery stock) whether or not eggs are present upon the berry 

 plants offered for sale in wholesale quantities. Our past experience 

 with this insect upon citrus trees teaches us that in its adult form it is 

 very difficult to kill, even with our most complete and powerful 

 methods. 



This investigation has developed no practical method of combating 

 the beetle upon berr}^ plants, but has suggested several methods of 

 relief and control against the larval and pupal stages. 



The first practical measure of relief that suggested itself for straw- 

 berry growers with a badly infested field or old plants is to take new 

 land. In case this method is adopted, the infested field should be 

 promptly plowed not later than June, and summer fallowed, this to 

 be followed b}^ a crop of grain and summer fallowed the second 

 season. 



In the case of strawberry growers who are not in position to obtain 

 new land, who have brought their land up to a state of high fertility, 



