174 DIFFERENT SPECIES OF INSECTS 



would injure the grapes, by giving them a dis* 

 agreeable flavour. 



2dly. When either a Hot-house or Vinery is 

 infested with any of the above-mentioned insects, 

 or when they may have been very numerous the 

 preceding season, it will be necessary to destroy 

 them effectually, before the Vines come into flower; 

 and this may be done by fumigating two or three 

 different times, at the distance of three or four 

 days between each operation. 



Pine-stoves are much more liable to be infested 

 with these insects than either Grape-houses or 

 Vineries ; because in the latter it is usual to take 

 off the glass-frames during the winter, by which 

 means the insects generally perish. But the 

 warmth of Pine-stoves serves to protect the insects 

 through the winter, as I have already observed. 



In Pine-stoves, the Thrips are often greatly 

 encouraged by many kinds of vegetables kept 

 there, and particularly by kidney-beans. The 

 increase of the insect upon this plant in the spring 

 is so exceedingly rapid, that it is not unusual to 

 see whole crops of this plant entirely destroyed by 

 them. In order, therefore, to prevent the increase 

 of these insects, it will be expedient, after the 

 stove has been fumigated, first to remove all such 

 plants as encourage them ; then to sow a fresh 

 crop of kidney-beans in pots immediately, and 

 these should be placed all over the flues, &c. so 

 that in case any insects should have escaped the 

 fumigation, the young bean-plants may attract 



