Fruit & Vegetable Production - GAP, IPM, Pest Control, Weed Control, Organic

Fertilizer Cost Calculations

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...
K.A. Barbarick
D.G. Westfall
Colorado State University Extension

Diagnosing Saline and Sodic Soil Problems

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...
R.M. Waskom
T.A. Bauder
J.G. Davis
G.E. Cardon
Colorado State University Extension

Best Management Practices For Phosphorus Fertilization

Phosphorus (P) is an essential nutrient for all forms of terrestrial life and is one of the 18 chemical elements known to be required for plant growth. In Colorado, agricultural soils generally contain from 800 to 2,000 pounds of total P per acre in the tillage layer. However, most of it is in...
Reagan M. Waskom
Troy Bauder
Colorado State University Extension

Coryneum Blight

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,...
H. Larsen
Colorado State University Extension

White Mold of Dry Beans

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. White mold is...
H.F. Schwartz
J.R. Steadman
D.S. Wysong
E.D. Kerr
Colorado State University Extension

Rust of Dry Beans

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...
H.F. Schwartz
J.R. Steadman
D.T. Lindgren
Colorado State University Extension

Root Rots of Dry Beans

Many soil-borne fungal pathogens are widespread throughout dry bean and snap bean growing areas of Colorado and surrounding states. Yield losses range from a trace to 100 percent, especially when adverse environmental conditions persist after planting and through flowering. The most common...
H. F. Schwartz
Colorado State University Extension

Bacterial Diseases of Beans

Many bacterial pathogens occur throughout the dry and snap bean growing areas of Colorado and surrounding states. Yield losses due to bacterial pathogens (including seed size and quality) may range from a trace to 100 percent, especially when adverse environmental conditions persist during the...
H.F. Schwartz
Colorado State University Extension

Agricultural Respiratory Protective Equipment

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. Substitute nontoxic substances: replace toxic pesticides with reduced-risk biological control agents or...
M. Legault
P.D. Ayers
S.K. McDonald
Colorado State University Extension

Agricultural Pesticide Protective Equipment

All pesticides are toxic. Toxicity times exposure equals risk. Some pesticide labels require the use of Personal Protective Equipment (PPE). This protects the handler from poisonings when mixing, loading and applying pesticides. Improperly handling pesticides increases the level of risk because...
M. Legault
Colorado State University Extension