Moist, warm weather is the best condition for the growth of
blight.
 On the opposite page is an illustration from a photograph
taken from a field showing the dissemination of blight. Near
the bottom is the center of dispersion. If the plate contained
more of the field it would show the rest of the blighted spot to
be similar to the above portion.


 Egg-Plant.
 The egg-plant shows a yellowing of foliage, and the plant
looks sickly. The lowest leaves fall off and leave the stem exposed.
Finally the fruit begins to fall off.
 If heavily attacked, a wilting, similar to that of the tomato,
takes place. There are no spots or other characters to tell the
blight. A typical diseased plant is shown in plate II.


 Irish Potato.
 The Irish Potato acts much like the egg-plant when at-
tacked by blight. The leaves are not dropped and the plant is
more tenacious of life.
 The attacked plant at once sets a great number of tubers,
which rarely get larger than peas or hazel nuts. It looks rather
curious, when carefully dug, to see a number of larger tubers,
about the size of a hen's egg, at the proper distance from the
stem, and then a great lot about the size of peas clinging closely
to the stem. The potato tuber is one of the most prolific sources
to propagate the blight. It is, however, only attacked when near
the surface or on top of the ground.


 Beans and Cow Peas.
 The various varieties of beans (Phaseolus) and the cow pea
(Dilochos) suffer severe loss in all stages of growth. The young cow
pea, or bean, usually dies before the blight matures, but the bear-
ing plant is a fertile field for its reproduction. The cow peas and
beans act very similarly when attacked by blight. The leaves