Greenhouse Insects 377 



being fond of sweet foods will be attracted, and 

 upon feeding on it will be poisoned. 



Hot House Milliped {Oxidus gracilis") 



These "thousand legged" little creatures are very 

 common in beds in which have been mixed large 

 quantities of rotted manure or leaf mold. They 

 often attack sprouting seeds, either devouring or 

 seriously injuring them. These millipeds may oc- 

 casion considerable damage in cucumber beds. The 

 common species is Oxidus gracilis. However, an- 

 other injurious form often met with is Julus vir- 

 gatus. 



Control. Gossard * of the Ohio Experiment Sta- 

 tion recommends the application of tobacco dust 

 mulch to the infested bed. This is spread out evenly 

 and worked in one-half to one inch deep. A mix- 

 ture of nicotine sulphate and water in the proportion 

 of 1 to 700 when applied to the infested soil will 

 also help to destroy the millipeds in the beds. They 

 may also be poisoned by placing at various intervals 

 on the beds slices of pumpkin previously dipped with 

 phosphorus rat paste. 



Sow Bugs, "Wood Lice," Isopods 



Sow bugs are abundant under potted plants or in 

 damp secluded places. Besides feeding on dead ani- 

 mal and vegetable matter, they also feed on living 



* Gossard, H. A., Ohio Month. Bui. 3: 55-56, X918. 



