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 120 acres of indoor growing space. …
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.
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.
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 ...
Altman’s additions - Greenhouse Management
WEBJan 24, 2020 — One of the largest-growing operations in the country, Color Spot’s remaining assets increased greenhouse space by 30% — adding an estimated 11 million square feet of greenhouse space and 1,500 acres of outdoor production. Of course, Altman had been growing steadily between acquisitions, as well. In 2018, the company added 32 acres of ...
Six poinsettia pests and how to overcome them
WEBAug 18, 2021 — Cultural: 1) remove weeds from within and around the greenhouse, 2) avoid over-fertilizing poinsettia plants with water-soluble nitrogen-based fertilizers, and 3) remove leaf debris from production areas. Scouting: 1) use yellow sticky cards to capture whitefly adults, which will help to detect early infestations, and 2) visually inspect the ...
Creating a comprehensive lighting plan - Greenhouse Management
WEBMar 23, 2021 — Key grower takeaway. A comprehensive lighting plan considers every aspect of the greenhouse and the crops to ensure the even and uniform distribution of light for the healthiest grow possible. With all of these factors being taken into account, the perfect lighting plan can be designed for an efficient, effective and thriving grow.
The ABCs of PGRs in vegetables - Greenhouse Management
WEBGM Staff. March 10, 2015. According to our 2014 State of the Industry Report, 43 percent of growers project edibles to be the category with the biggest increase in production this year. Greenhouse Management recently spoke with T. Casey Barickman, Ph.D., about the use of plant growth regulators (PGRs) in vegetable transplant production.
Pythium and Rhizoctonia: A root rot primer - Greenhouse …
WEBApr 7, 2011 — Rhizoctonia fungi typically cause a dull brown to dark brown rot on cuttings or lower plant stems. Pythium on geranium Sanitation is especially important in limiting Pythium root rot. Use a pressure washer with soap and water when cleaning walkways, benches, etc. Then treat cleaned surfaces with a disinfestant to remove any remaining …
Battling the leafhopper blues - Greenhouse Management
WEBJun 11, 2013 — Adult leafhoppers are small insects (about 1/8 to 3/16 of an inch long) with slender, wedge-shaped bodies that taper at the end. With piercing-sucking mouthparts, leafhoppers feed on plant sap, causing pale spotting or distortion of leaves, yellowing, stunting and loss of plant vigor. Potato leafhopper. The potato leafhopper is found …
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