THE DEFORESTED HILT, WITH ITS UGLY FIELD OF STUMPS, SHOWN IN THIS PICTURE, 



WAS ONCE A BEAUTIFUL PINE GROVE 



As the gypsy moth had stripped the trees of their foliage, they had to be cut down, 

 because pine trees will not recover from a single stripping of their leaves. Elms, maples, 

 and other deciduous forests will usually stand two or three defoliations. 



of new pests. We know very little of 

 the injurious insect pests of those coun- 

 tries, and particularly of China, but the 

 importation of new stock in the last 

 year or two, from China especially, has 

 demonstrated the existence there of 

 many pests which have not hitherto been 

 known. The power of harm of these 

 new pests is abundantly illustrated by 

 the San Jose scale, which is one of the 

 earliest of the Chinese insect pests to 

 reach us, and undoubtedly came to this 

 country with some ornamental nursery 

 stock sent from north China. 



Among the known foreign insect fruit 

 pests which it is very desirable to keep 

 out of this country are the Morellos 

 fruit worm, which is an important enemy 

 of citrus fruits in certain parts of Mex- 

 ico ; the olive-fruit worm, which occurs 

 throughout the Mediterranean countries 

 where the olive is grown ; the mango- 



seed s weevil, which has been found in 

 imported mango seed during the present 

 year; several fruit-scale pests known to 

 occur in China, Japan, and other Oriental 

 countries, which have records for harm 

 quite as great as the San Jose scale ; the 

 gypsy and brown-tail moth to regions 

 in this country where they do not now 

 occur, and many other equally dangerous 

 insect enemies of fruit trees, forest trees, 

 and farm crops, known to occur in for- 

 eign countries. 



In addition to the danger of importing 

 these insect pests is the risk of bringing 

 in new and dangerous plant diseases. 

 Two illustrations of this danger only will 

 be mentioned, but there are many others 

 equally important. First may be noted 

 a new disease of the potato, known as 

 the "potato wart," which there is grave 

 risk of establishing in this country. This 

 disease, once in the soil, destroys the 



