Over the last several years we’ve heard many reports of poor quality cuttings. There are a range of causes, often due to the interconnectedness of our sector across the world. Staffing shortages along the supply chain and reduced or delayed air transit can affect our shipments. We’ve gathered resources from various experts and tried to compile them here for you to reference. While it’s basic information, it’s good for a refresher and for when things get overwhelmingly busy. Read on for some tips on getting the most out of your cuttings this summer to ensure healthy crops this fall and winter.
Before Cuttings Arrive:
Sanitize, sanitize, sanitize! Now’s the time to prepare for incoming poinsettia and fall mum cuttings. Make sure benches, irrigation lines, drippers and misting equipment has been thoroughly cleaned. Use Virkon or a quaternary ammonium product at the recommended rates. These products are only effective if the surface is clear of any residual growing media and plant debris so be sure to give everything a thorough scrub first. Make sure to rinse everything well after using these products to avoid potential phytotoxicity in sensitive cuttings and young plants. Ensure your water treatment system is working and consider proactively sending in water samples to the lab to identify any lurking issues before the season starts.
Spring is almost here…we hope! We’re reposting this article on poor air quality damage on spring bedding crops as we’ve seen some damage again this year. Symptoms, solutions and preventative measures are listed below. If you think you have a problem, please contact a licensed contractor to inspect your heating system.
Natural gas and propane are popular choices when it comes to heating a greenhouse. The products of burning fuel are carbon dioxide (CO2) and water (H20); both compounds we know are good for your plants. However, combustion is often (if not always) incomplete, and impurities such as carbon monoxide (CO), sulfur dioxide (SO2) and ethylene (C2H4) are also released leading to poor air quality if your heater is not properly vented.
Typically symptoms from ethylene damage and sulfur dioxide damage can been seen fairly quickly after exposure.
In the short term (a few hours to a few days), ethylene damage results in leaf curling, epinasty (leaves bending downwards from the petiole) and flower drop. If the stress continues over a longer period (several days to a week or more), plants can take a long time to flower, or not flower at all. Ethylene levels as low as 0.01 parts per million (ppm) can create symptoms in sensitive species. Levels are usually highest near the heater and can be diluted by air circulation.
Its a busy time in the greenhouse, but our next topic is timely! Rot rots like Fusarium, Pythium and black root rot are often the bane of spring bedding crops. Dr. Mary Hausbeck, a Distinguished Professor from Michigan State University, is going to share her vast knowledge on this topic, including which fungicides work best. Check out the details below, and don’t forget to register!
Its a busy time in the greenhouse, but we hope you’ll make some time to listen to our next webinar, focused on using supplemental lighting in greenhouse propagation. Dr. Erik Runkle and Dr. Roberto Lopez from Michigan State University, join us to share their vast knowledge on this topic. Check out the details below, and don’t forget to register!
This post was jointly written by Dr. Chevonne Dayboll and Dr. Sarah Jandricic
It’s time to think about spring again! This post gathers some of the most important things to plan and prep for in the greenhouse before your spring production begins in earnest.
1. Make sure your inputs are ordered
We can’t emphasize this one enough. COVID-19 and container boat issues are still causing shipping delays that are affecting many industries including greenhouses. Make sure you order potting mixes, plastic trays and pots, fertilizers, and production inputs well ahead of when you will need them. If you are planning on doing greenhouse upgrades in between seasons make sure you confirm delivery and installation timelines with your contractors. Many of them are facing delays too!
2. Now is the time for preventative maintenance
Now is a great time to schedule preventive maintenance for your boiler, irrigation and shading systems. Make sure that all motors and alarms are working before you need to rely on them. No one wants to find out that their temperature alarm failed on a cold February morning! Ensure you are getting the pressure you expect all along your irrigation system. If you rely on propane heaters for early spring production make sure they are venting properly. Damage from improper venting can present as stunted growth or leaf burn.
Take some time to inspect the greenhouse for wear-and-tear. Repair cracked poly and broken glass to keep heat from escaping. Make sure old torn energy curtains are replaced. A heat sensitive camera can help to identify areas of energy loss and help you plan for energy efficient upgrades in the future.
Although “floriculture” is in the title, the sensors and apps Dr. Krishna Nemali from Purdue University will discuss have applications across all avenues of controlled environment agriculture. Keep reading for details on the webinar, and how to register.
Once you’ve got your water sample, this post will cover why water DNA tests are useful, and how to interpret the results. This is the next step towards identifying and then treating your water issues to prevent unnecessary fungal or bacterial disease in your greenhouse crops, and potentially save you thousands of dollars in crop losses or fungicideapplications.
These posts make good refresher resources, so make sure to bookmark them!
When poinsettias get problems, they always seem to hit hard and fast. Things like whitefly, Lewis mite, root rots, and nutritional issues can all quickly derail a quality crop. This is why scouting might be more important in this crop than any other.
Here’s a month by month guide on what you should be looking for to prevent small problems from becoming big issues.