l.S JOURNAL OF AGRTC'ULTt'RE OF P. E. 



V 



luoveiiioiits ami may ln' readily captui'i'd. Jioys and men can go 

 around at night with bags and lanterns and colici't the beetles in 

 large numbers liy shaking them from their food i)lants. 



The beetles fly during the months of IMareh to Noveiiilxr. ijielusive, 

 l)ut they are more abundant and hence more easily collected at cortaiii 

 times during this period. These i)eriods of abundaiici' vary some- 

 what with the locality and it is necessary to watch conditions care- 

 fully in ni-dei' to tidce advantage of them. 



INSECT I'AKAsrPKS AND Kl'XCTS DISKASES 



In view of the fact that the white gi'ubs ol-' I'oi-to Kico suffer but 

 little from the attacks of insect parasites, attempts wen- made to 

 introduce some from other parts of the world, lleports on these 

 efforts have been made in other publications of this station, so that 

 no further mention will be made of this woi-k here. 



In addition to the introduction of insect parasites attempts were 

 made to utilize a disease of the.gi-ubs and beetles known as the gi-een 

 muscardine fungus, Mftarrhizhnu (Uiisoplia. A i-eport on this work 

 has been made by Mt-. John A ytevenson, pathologist of this Station. 

 and may be found in this nuudxM' of the Jnnnidl. 



coxcLrsiox. 



in conclusion it may bi^ stated that control of the white grub is 

 ■still one of the laitgest entomological j)i"obleins of the Island and 

 that undoubtedly a vast amount of work still remains 1(t be can-ied 

 out. The collecting of the grul)s and Ix'etles is at present the only 

 practical method of holding them in check, and.it is far from being 

 entirely satis factoi-y. 



It seems likely that the most pi'omising I'oad to success in white- 

 grub conti'ol for Porto Rico will be in the introduction of predacious 

 ^ind parasitic i'n<'mies. 



