AND OTHER INJURIOUS INSPECTS OF I907 AND IQoS. 12^ 



These conclnsions were published (Circular of Information No. 9) 

 in April. 1908, and mailed to market gardeners throughout the state. 

 Although it takes but a .small space to thus summarize the work, these 

 few statements represent a large amount of work. Three thousand 

 cauliflower plants were used in our experimental garden, besides a 

 large number of cabbage plants, and in addition, co-operative work 

 was carried on in truck gardens. 



The details of the work of 1907 are given below. 



Dipping Plants in Arsenate of Lead: Ten experiments carried out by 

 R. L. Welister, at that time assistant in this division. Rows contained 

 SO plants eacli. and tlie alternate rows were left untreated to serve as 

 checks. The final couuts of this lot were made July 24th and 26th, and 

 the results will be found in the accompanying table. The question to be 

 answered was "Can arsenate of lead, aione^ or in combination with other 

 substances to make it adhere, be successfully used as a dip with cauliflower 

 and cabbage to protect them against the Cabbage Maggot?" 



The cauliflower plants iu this series were set Afay 17t]i, and tlie treat- 

 ment first applied at tlie time of plantmg. At first only the roots were 

 dipped, Init when this method was found too laborious, the entire plant 

 was immersed. Swift's Disparene was the brand of arsenate of lead used 

 in the ten experiments. 



Expcriutciif No. 1, (Row 2.) 



Fifty cauliflower plants were first dipped into a soap solution, then 

 into arsenate of lead and planted immediately. The soap solution consisted 

 of one-half ounce of hard soap dissolved in two quarts of water, and the 

 arsenate solution contained one ounce of disparene (arsenate of lead) to 

 one pint of water. 



Ext^crimciit No. 2. (Row 4.) 



Fifty cauliflower plants dipped in disparene. One ounce of disparene 

 to one pint of water was used. 



Experiment No. 3, (Row 6.) 



Fifty cauliflower plants dipped in disparene. One-half ounce of dis- 

 parene to one pint of water. 



Experiment No. 4, (_Row 8.) 

 Fifty cauliflower plants dipped into a solution of disparene. glucose, 

 and water. The solution contained one ounce of disparene. two ounces 

 of glucose and one pint of water. The glucose was dissolved by boiling 

 and added to the disparene. 



Experiment No. 5. (Row 10.) 



Fifty cauliflower plants dipped in a solution of disparene, molasses 

 and water. The solution contained one ounce of disparene, eight ounces 

 of molasses (fluid measure) and one-half pint of water. 



