. Florists' review [microform]. Floriculture. STEM-ROT STUDIES. One of the most serious and trouble- some diseases which must be contended with by carnation growers in this coun- try is the so-called stem-rot due to the fungus rhizoctonia. In July, 1912, a study of this disease was undertaken by George L. Peltier, associate in flori- cultural pathology at the University of Illinois Agricultural Experiment^Sta- tion, together with a thorough investi- gation of those diseases of vegetable, field and floricultural crops which are caused by rhizoctonia, the primary ob- ject being to determine whet
. Florists' review [microform]. Floriculture. STEM-ROT STUDIES. One of the most serious and trouble- some diseases which must be contended with by carnation growers in this coun- try is the so-called stem-rot due to the fungus rhizoctonia. In July, 1912, a study of this disease was undertaken by George L. Peltier, associate in flori- cultural pathology at the University of Illinois Agricultural Experiment^Sta- tion, together with a thorough investi- gation of those diseases of vegetable, field and floricultural crops which are caused by rhizoctonia, the primary ob- ject being to determine whether infec- tion is brought about by one or by more than one race or species of this fungus. The results of the investigation now have been embodied in Bulletin No. 189, consisting of 112 pages, which will be sent free upon request, addressed to Director, Illinois Agricultural Experi- ment Station, Urbana, 111. "Kepeated observations in the green- house and field," says Prof. Peltier, "have shown that a certain amount of the mycelium must be present before the fungus is able to attack and kill the plant. A small amount of mycelium has always been observed around a car- nation plant in the bench a week or more before the plant showed any signs of being diseased. In fact, a certain amount of mycelium is always present in the carnation soil in the greenhouse, but it is only when the temperature is high that the fungus is able to attack the plants. This explains why stem-rot of carnations is more severe during the summer months than in the winter. In the field similar conditions are neces- sary to result in the infection of a ; SHADE FOR CARNATION HOUSES. Will you please inform me what is the best shading for carnation houses when the field-grown plants have just been set out in the benches? Some claim that plain whitewash is better than if mixed with mud or other color- ing matter, as the white surface does not absorb the heat from the sun. Even if this is
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Keywords: ., bookcentury1900, bookdecad, booksubjectfloriculture, bookyear1912
