THAT INFEST THE VINE. 
163 
to Vines growing there; and, as I have obferved, more parti- 
cularly fo to the forts that produce white berries. 
This fpecies, however, is not confined to the Hot-houfe 
only, but is commonly found upon plants growing in the open 
air, as alfo upon flowers : Thefe infects are often very nu- 
merous upon the flowers of pinks and carnations. 
The Thrips fometimes attack the young flioots of Vines 
growing in tlie open air, efpecially thofe of weak Vines, or 
Vines newly planted. 
If young flioots chance to receive any injury by late fpring 
frofl, the tender part of the leaf will immediately curl up, 
and change to a dark-brown colour ; and in this flate the 
Thrips generally attack them with great greedinefs, efpecially 
the white Sweetwater and white Mufcadine kinds. Thefe 
forts are generally planted againfl; common walls. 
The Thrips, however, are feldom injurious to Vines grow- 
ing in the open air, except in the fpring; and to thofe in the 
Hot-houfe they are moft hurtful when the grapes are nearly 
ripe. They attack the bunches as well as the leaves, and com- 
monly prey upon the extremities of the berries, but more par- 
ticularly at the end next the foot-ftalk. In white grapes, the 
part of the berry injured changes to a dark colour, the foot- 
flalk turns black, and the berry withers. 
X 2 
3. The 
