82 Mr. Markwicr’s Account, &c. 
difeafed plants, inftead of being loft, produced a number of lateral 
fhoots, and the crop in the field of wheat in which the fly had 
made fome havock turned out exceeding well, it follows that Mr. 
Bjerkander's advice of picking up and burning the ftems that are 
infefted, would be highly prejudicial; but perhaps pinching the 
central leaves, juft above the crown of the root, where the infe& 
is ufually found, might effeétually deftroy it, and leave the plant in 
a ftate to throw out its lateral fhoots. If, however, a method could 
be difcovered to deftroy the parent animal, it would vatem. be the 
moft efficacious. 
Nov. 1, 1791 ; 
. THOMAS MARSHAM. 
XI. De- 
