222 Agricultural Expeeime.nt Station, Ithaca, N. Y, 



indioated by the dot-shaded portions of the leaflet in Fig. 3. For- 

 tunately, this fungus is rarely serious. For ourselves, we have 

 had no experience with it, but 1 see it occasionally in tomato 

 houses. It is apt to appear in late winter or early spring, often 

 not until the winter crop is nearly harvested. In such cases, the 

 buniing of the old plants as soon as the last fruit is off wUl be the 

 best treatment. If it appears earlier, however, spraying with 

 ammoniacal carbonate of copper is to be recommended. 



3. Koot-Grall. — Nematode injuries of roots have received much 

 study of late and the attention of growers has been called to 

 them in bulletins and in the press. But there are still very few 

 horticulturists who aire aware of the extent to which they infest 

 our greenhouses. Many common plants, as geraniums, begonias 

 and coleus, are subject to their attacks, and the diseased pLint — 

 or the soil in which it grew — is often dumped into the dh't-bin, 

 where it propagates the trouble. In the southern Statesi the 

 nematodes are serious enemies to many plants in the field, even 

 to trees, but in the north they confine their attention mostly to 

 indoor plants. This indicates that severe frost is fatal to them, 

 and suggests a remedy in the freezing of houses which are seri- 

 ously attacked, when this can be done to advantage, as between 

 the crops of winter tomatoes. Nematodes are very minute animals 

 belonging to the true worms, and allied to the trichinae. These 

 nematodes are a serious menace to tomato growing under glass. 

 They attark the roots, causing the formation of galls. 

 Sometime^ the whole root is swollen into one ragged 

 shapeless mass, strongly reminding one of the club-root of 

 cabbage. The trouble is likely to be worst in those plants which 

 are carried over from the preceding winter. In general appearance 

 plants injured by root-galls are very like those attacked by the 

 winter-blight already described, save that the leaves do not show 

 a spotted discoloration. The plants become weak, stop growing, 

 the leaves curl and become yellow and dry, much as if the plant 

 were suffering for water. 



