44, 
PLUM. 
SLUG-LEECH. 
See under “ Pear,” page 42, ante. 
SCALE. 
As with other fruit-trees, two or three species of scale-insects 
are found upon the plum. 
For treatment, see under “ Apple-scale,” page 16, ante. 
BORER. 
Tn the northern districts the plum is attacked by a boring insect, 
which often causes the decay of the upper portions of the branches. 
At present the insect has not been obtained in any stage. 
APHIS (Aphis prum). ; 
This species is sometimes abundant on the under-surfaces of the 
leaves, which are often curled, and afford copious skelter to the insect. 
Its ravages are often of a serious character. 
For treatment, see under “ Apple-aphis,” page 18, ante. 
STRAWBERRY. 
GRASS-GRUB (Odontria zealandia). 
This voracious pest is yearly becoming a more serious enemy to the 
strawberry-grower. It feeds on the roots, and speedily impairs the 
vigour of the plant, so that growth is checked, the plant becomes 
stunted in appearance, and is unable to mature fruit. 
For description and treatment, see under “ Olive,’ page 35, ante. 
VINE. 
VINE-MILDEW (£rysiphe, sp.). 
This troublesome fungus is more generally known under the name 
of Oidium Tuckeri, but fungologists are now agreed that it is simply an 
obscure state of some species of Erysiphe, producing secondary spores. 
It forms patches of delicate white mould on the leaves and stem, the 
mycelial threads being of extreme tenuity, and giving off erect 
filaments, which develope minute spores (conidiospores) by a process 
of transverse division. 
The most approved remedy is sublimed sulphur, dusted freely 
over the affected parts. In all probability washing the affected leaves 
with a solution of pernuieninke of potash—say, 2 oz. to a gallon 
of water—would be found even more effective. 
VINE-LOUSE (Phylloxera vastatriz). 
The occurrence of this much dreaded pest in the colony was 
recorded by Mr. J. A. Pond in the Auckland. newspapers of May last. 
On my arrival in that city I visited Mr. Pond’s laboratory, and was 
