232 AGRICULTURE ON THE PACIFIC SLOPE 



the skin. This is just what the growers and packers \\ 

 have found, and this knowledge has been worth many // 

 thousands of dollars each year. 



Brown rot of the lemon. Another disease which 

 produces spots on lemons is the brown rot. This is 

 able to penetrate the skin even where it is not bruised or 

 broken. If in the experiment just described the growth 

 starts where the skin is not broken, it is probable that 

 we have the brown rot. But the wound through which 



FIG. 133. The brown rot is spreading from the lemon on the right to the 

 lemon on the left, in spite of the fact that its skin has not been bruised 

 or injured in any way. 



the blue mold gains entrance may be invisible to the 

 naked eye. 



A lemon with brown rot will soon affect all the lemons 

 in the box or pile in which it is placed (figure 133). 



