13 
With older trees taken from healthy locations and set in infected soil 
the program varies. The Peach and Fig often grow vigorously one or 
two years, and bear fruit that is very prone to drop iinmaturely, then 
the tree takes on an irregular growth of stunted limbs and small leaves. 
The tips of these limbs die back gradually to the body of the tree. If 
the soil is clayey the tree will put out feeble sprouts often for several 
years. 
With the Pecan, English Walnut, and Willow, older trees remain sta- 
tionary a year or so and die with the occasion of a severe drought. 
In many cases, especially in old fields, the seeds of trees and plants 
barely germinate, or cuttings hardly form rootlets till they are invaded 
and destroyed. 
In all of these cases the effect is to deprive the stems and leaves of 
food and moisture; the knots grow, the branches do not. 
The annual destruction of nursery stock is enormous, especially the 
Peach, Pig, Willow, Spiraea, Buddleia, Coleus, etc. 
In the sketches taken from nature, attached to this report, are shown 
typical specimens as far as possible. 
The Grape, Fig, Mulberry, and Orange are prone to circular knob-like 
knots on the sides of the larger roots, and an occasional enlargement 
at the junction of small roots. (Plates IV and VII.) 
The Peach, Plum, Walnut, and Spiraea grow irregular masses, involv- 
ing the whole root seemingly. (Plate V.) 
The Willow, Okra, etc., enlarge, and the decay is usually visible first 
at the extreme tip of growth from the central stem. (Plates VI, I, and 
II.) 
TERRITORY OCCUPIED BY THIS DISEASE. 
Early in the beginning of my studies of the Anguillula, I addressed 
letters of inquiry to most of the leading nurserymen and horticulturists 
in the United States, especially those in the southern section, asking an 
examination of diseased trees, and inclosing samples of the root-knot 
for comparison. 
The replies I received are conclusive that the disease is unknown be- 
yond any point in the interior 150 miles from the coast. 
It does not exist except in locations free from extreme cold, and the 
northern boundary is not far from the January isotherm of 50°, as shown 
in the No. 2, Isothermal Lines of the U. S. Signal Service, 1881. 
Letters from the Peach districts of Michigan, Maryland, and New 
Jersey complain of the " Yellows," but investigators do not report find- 
ing the diseased roots indicative of the Anguillula. 
It is not found at Denison, Tex. (Munson), only along the coast in 
that State, and then only in sandy, wet locations. (Onderdonk.) 
The usual dry air of New Mexico, California, and regions west of the 
Mississippi Eiver, with the summer parched soil of these sections, forms 
apparently a barrier to the growth and spread of the disease, but coming 
