Fruit & Vegetable Production
If the cost per pound of elemental P or K is desired, then the guarantee must be changed from P2O5 to P and/or K2O to K. To find the conversion factor, use the ratio of the molecular weight of (2 x P) and divide by the molecular weight of P2O5. A similar approach is used for K. No conversion is needed for N since it is already expressed on an elemental basis.
Symptoms and causes of salinity, high pH, specific ion toxicity, and sodicity are frequently confused. Each of these conditions can have adverse affects on plant growth, but they differ significantly in their cause and relative impact. Effective management of these problems vary and require proper diagnosis. Proper diagnosis is critical to successful problem correction.
Coryneum blight — also called shot hole disease, California blight, peach blight or pustular spot — is caused by the fungus Coryneum carpophilum. In Colorado it affects mainly peaches and apricots, and to a lesser degree sweet cherries. Severe foliar shot holing may weaken a tree, while the most apparent damage is infection of the fruit.
One of the most important diseases affecting dry beans in western Nebraska and Colorado is white mold caused by the fungus Sclerotinia sclerotiorum. In recent years, losses from this disease have averaged as high as 20 percent, with a few individual field losses exceeding 65 percent.
Rust is an important disease that affects dry beans in eastern Colorado, western Nebraska and surrounding regions. The disease is caused by the fungus Uromyces appendiculatus, which has caused periodic epidemics in this region during the last 50 years. Recent losses from the disease have exceeded 50 percent in some areas.
Many harmful air-borne contaminants exist on farms and ranches, e.g., pesticides, dusts, anhydrous ammonia, etc. Protection from air-borne contaminants can be achieved in several ways.