Show Irne reame of infect en atou it needs little argument to prove that the enemies of cultivated plants aro arc steadily tea dlly increasing and I 1 think it can be easily shown that they will ill continue to increase so long as the conditions condl tlona for which ve re are in large part cespon ais ai remain a they are at I 1 do not act by any means regard this sa a a calamity on the contrary I 1 look upon the fact act that our insect and fungous toes are increasing as aa direct proof that we are progressing tor for as aa professor bailey has said our enemies increase because cultivation induces change of bobita in wild organisms because it presents prevents an ever increasing variety of food or host plants because the food supply Is large and to in mors mon or ar lose less continuous areas and finally because the natural equilibrium or tension tent lon I 1 Is destroyed it follows therefore that the more we put forth our energies to improve our native plants or to change their habits the more we endeavor ta tl increase the variety ind and number ot of our cultivated vines trees and shrubs the more we extend our orchards our vineyards and our fields lust just so much more do we disturb the equilibrium in nature and lust just so BO much more m must ut we expect to burdet burden ourselves with the work of maintaining this unstable condition by more or less artificial means where an insect or fungus bad one chance a hundred years ago to wax strong and spread it has now a thousand chances tor for unbroken orchards chardi or and vineyards and millions ot of nursery trees cover the country where then only wild plants grew it la in but natural then that man seeing the onward march of his enemies should look about him and wonder how it will all end and how he as an individual Is to obtain relief in many cases he be it has as found a way of doing this by adopting certain more or less empirical methods again with a fuller appreciation of the fundamental principles underlying derly plant growth hb has haa learned partly by intuition to keep his plants in ill health and when he be has reached this stage he stands tar far in advance of his bla neighbor who waits until his plants are diseased and then begins to look about tor for a spraying apparatus B T galloway |