R.-MKDLES AGAINST JilH HOP GRUB 



37 



Fig. 2. 



" muffle heads" as they appear, a yard of considerable extent can In- 

 kept clear with little trouble : the larva* do not appear to remain in the 

 head more than a week or ten days, and that during the time when the 

 vines an' low, the tips within plain sight and easily reached. 



Fourth. If none of the preceding* methods have succeeded in entirely 

 ridding the yard of grubs, and as a matter of precaution, even it no 

 damage from grubs is observed, it is good policy to 

 expose the roots for a few days ; but little trouble 

 is necessary to do this, for before hilling the roots 

 are but scarcely covered, and only enough earth 

 to bare the junction of the growing vine with the 

 old root need be removed. This should be done 

 earl}' in June, when the larvrehave left the inside 

 of the vines. They will not eat above ground, and 

 will take to the old roots, to which they do little 

 or no harm. Five or six days will be a sufficiently 

 long time to expose the roots; then apply a hand- 

 ful of a mixture of coal and wood ashes, 

 or ammoniated phosphate, and hill high. 

 Both of these substances have been used 

 as remedies against the grub, and both 

 successfully by some and unsuccessfully 



by others; the differences are unreconcilable by the fact that 

 in neither case was it the application of the ashes or phos- 

 phates that destroyed or kept off the grub, but the treatment 

 adopted in conjunction with these applications. If, in addition 

 to the application of any desired fertilizer, the j^ 



vines are hilled, and the hills made high, the vines 

 will throw off rootlets above the main root and 

 be able to derive sustenance from them, whereas 

 when there are no hills, or the hills are low. when 

 the grub does attack the vine it immediately de- 

 prives it of a part of the necessary sustenance 

 and impairs its vitality. Both the ashes and 

 phosphate are repugnant to the grub, but not 

 deadly, and it will dare them after a few days to 

 get at its favorite location. Figs. 2, 3, and I ex- 

 plain my meaning: the former is from a vine al- 

 most eaten oil", but still flourishing, being sus- 

 tained by its rootlets, much longer and more- 

 Pig " 3, numerous than indicated in the figure, while the 

 two latter are from vines insufficiently hilled, and which were killed 

 by the grubs. The vine represented in Fig, 3 had been slightly bent 

 and partially covered with earth and was attacked by three grubs in 

 as many places. 



Parasites 1 have not found or heard of, but the larva of a Tarabid. 

 probably CaJosoma calidum, is known to \Wd on the young grubs, A 





