24 UTILIZATION OF MINUTE LIFE. 



appears to be known, is caused by a parasite fungus, 

 Botrytis bassiana, developed in the body of the grub. 

 Absolute cleanliness is the only method by which the 

 invasion of this parasite can be prevented. As soon 

 as it has made its appearance, the sick larvae must 

 be immediately separated from the others. 



Atrophy- or Rachitism is generally caused by 

 a careless incubation ; it is then incurable ; but if 

 this disease result from negligence in the breeding, 

 it can be remedied by separating the sick larvas 

 from the others, and feeding the former upon more 

 delicate leaves. Gangrene, which finally reduces the 

 grub to a black fetid liquid, is the result of other 

 morbid affections, and is without remedy. Jaundice, 

 which is characterised by a swelling of the skin, 

 which bursts at different parts of the insect's body, 

 is generally caused by sudden atmospheric changes, 

 which trouble the functions of digestion, and is 

 almost always fatal. 



In the department of Yaucluse, where, on a 

 small area of land, more than two million of mulberry 

 trees are grown, gangrene, resulting from these and 

 other maladies, is arrested in its course by sprinkling 

 quicklime over the larvae, by means of a very fine 

 sieve, and then covering them with leaves soaked in 

 wine. 



Apoplexy is sometimes determined by sudden 

 changes of the weather, and by bad nourishment ; 



