6 common greenhouse problems & how to solve them
WEBMar 2, 2021 · Common problem No. 4: Constant mold and pest problems. Besides the overall function of the watering/fertigation system, close attention to disinfection is a major priority. Pythium and other vectors for disease can be transmitted by contaminated irrigation equipment and/or contaminated water. If growers are experiencing continued Pythium ...
Improving thermostat performance - Greenhouse Management
WEBOct 29, 2012 · This can vary from 1°F to 8°F for mechanical thermostats. If you want to maintain a minimum 60°F (setpoint) in the greenhouse and have a thermostat with a 6°F differential, the furnace will start when the temperature falls to 60°F but doesn’t turn off until it reaches 66°F. This override overheats the greenhouse and increases both the ...
A bigger & bigger circle - Greenhouse Management
WEBNov 29, 2021 · Founded in 1968 by John van Wingerden, Green Circle Growers has called Oberlin, Ohio, its home for over 50 years. Today, John’s son, CJ van Wingerden, and son-in-law, Scott Giesbrecht, run the business as co-CEOs, and they still consider Oberlin to be their home base, with their facility spanning over …
Consider your covering - Greenhouse Management
WEBFeb 25, 2016 · It is being touted as being more resilient to winds, hail storms and snow loads, having a 120-pounds-per-square-foot snow load rating and 100-mph wind rating. The structural framework of the greenhouse will contribute to the overall resistance to the forces of nature. The bubble wrap type covering has an R-value of 1.71.
Automating irrigation - Greenhouse Management
WEBOct 25, 2017 · Overhead irrigation, substrate surface irrigation and subirrigation are three automated watering options for growers. Fig. 1. These Easter lilies are irrigated with the boom at the top of the image. Note the plastic saucers underneath the containers to catch excess irrigation and allow it to be utilized by plants.
Mode of Action Group 3: DMI fungicides - Greenhouse Management
WEBJune 21, 2010. The mode-of-action group 3 (demethylation inhibitors, also called sterol biosynthesis inhibitors) fungicides were first introduced in the mid 1970s and products continue to be introduced. There are over 30 active ingredients in this group with only a few currently registered for ornamentals.
Choose the best shading material for your greenhouse
WEBNov 1, 2016 · Internal shade curtains. Growers can reduce greenhouse light transmission to reduce water loss and plant temperature (heat stress) or for crops that are sensitive to high solar radiation by using shading materials. The two most common shading strategies used in commercial greenhouses to reduce solar radiation are: 1) …
Mode of action Group M1: Copper - Greenhouse Management
WEBMar 1, 2010 · Using the mode-of-action groups is important but it cannot predict with 100 percent accuracy whether a particular pathogen will become resistant to a specific active ingredient. In nurseries, copper fungicides are commonly used on leaf diseases due to their relatively low cost. Use on greenhouse crops is less common perhaps due to the higher ...
Understanding the difference between water pH and alkalinity
WEBMar 7, 2011 · Water with a pH below 7.0 is termed “acidic” and water with a pH above 7.0 is termed “basic”. Water with a pH of 7.0 is neutral. Water alkalinity. Alkalinity is a measure of the water’s ability to neutralize acidity. An alkalinity test measures the level of bicarbonates, carbonates and hydroxides in water.
Applying the strategic profit model in the real world
WEBMarch 12, 2010. In the February issue of GMPro (Page 20) we provided an overview of the Strategic Profit Model, as well as selected financial ratios that can serve as a barometer of the financial performance of your greenhouse business. The Strategic Profit Model (also known as the DuPont Model) gives a visual view of a company’s finances and ...