Best PracticesFor researchers using Biotech Support Facility & Rightmire Hall Growth Chambers and Greenhouse
IntroductionsGary Posey, Greenhouse SuperintendentDay to Day at BSF & Rightmireposey.8 292-9241Joan Leonard, Program ManagerDay to Day at Bio Sci GreenhouseOversee renovations and implementation of best practices at BSF & Rightmireleonard.4 292-7904
Why?Reduce/ eliminate pest and disease issues & improve plant healthIncrease experiment successImprove uniformity and repeatabilityAbide by all regulations set by NIH, APHIS, EPA, ODA and Federal laws
Planting & Growing DosDO use clean and sterile pots and traysDO label all pots/flats with researcher name -unlabeled plants will be considered abandoned and will be disposed of.DO surface sterilize seed (10% bleach, 10 min.)DO follow order of entry to chambers/growth rooms/greenhouseDO water and fertilize properly (use care not to overwater)DO wear dedicated lab coat for each growing spaceDO know how to ID thrips, fungus gnats and signs of INSVDo make sure all staff and students have read the best practices and met with Gary for a training session.
Potting Room 100 BSFNo seeds are permitted in the potting area, room 100 BSF to prevent contamination of mediaFill pots in 100 BSF then plant seeds in room 160A, the greenhouse or your labFor Arabidopsis, 3 scoops of media = 1 flat. Incorporate 2 TBL of osmocote for each flat prepared.
Photo courtesy of Purdue University
Proper WateringArabidopsis IS NOT AQUATIC!Overwatering: #1 cause of plant diseases, pest problems and plant death! Too much-Too often.Overwatering weakens roots and allows pests and diseases an opportunityNever leave plants in a tray of standing water. Soil will reach saturation within 10 minutesexcess water in trays after this will only weaken the plants.Green algae growing on soil surface is sure indication of overwatering.Plants found standing in trays of water will have holes poked into the trays!
QuantityWatch nested flats: water can get trapped Only water pots/cells that are dry instead of whole flat.Know if plants need waterwhat is dry?If bottom watering whole flat, add only enough water to cover bottom of flat. This should get taken up within a few minutes. If not, then plants were not thirsty.Pour off excess water after 10 minutes! Never leave standing in water longer than 30 minutes. Water not used in 30 minutes will deprive roots of oxygen.
FrequencyCheck daily BUT only water as needed!Water individuals when dry rather than watering all plants in flat at same timeDont follow a rigid watering scheduleAvoid watering insuranceThis is overwatering to compensate for not checking on plants daily.Heavy watering on Friday will make sure plants dont need any over weekend and possibly even until following Friday or longer!No need to overwater to make it through the weekend. A well-watered plant on Friday will be fine on Monday.Rarely have we seen underwatered plants! This is easily fixed by adding water. Overwatering cannot be easily fixed.
Disposal DOsDO cover all plants during transport and disposalDO promptly dispose of unnecessary plants in yellow steam carts (no plastics, no stakes, etc)DO keep growing spaces and adjacent areas, and potting room 100 clear of debris/dirty pots/dead plantsDO report infestations of pests and diseases to managerDO immediately discard all INSV infected plantsDO make sure all lab staff are educated in procedures and are following them. This is the responsibility of the PI.
Handling DONTsDONT leave chamber/rooms doors hanging openDONT move plants from one chamber/room to anotherDONT put all your eggs in one basket. (Stagger germination dates and location of valuable plants to increase chances of success.)
- Thrips IDWestern Flower ThripsAdults are less than 1/20th of an inch (
Fungus Gnat IDLarvae feed on plant roots & spread diseases
Slows plant growth & can kill seedlings
Thrive in wet soils
Best control is prevention through proper wateringdo not overwater
Powdery MildewCommon in crowded conditions with poor air circulation, low light and dampnessAKA a growth chamber!
Spores are short-lived and need moisture to germinate.
Sleeved plants are especially susceptiblecut holes in sleeves for better air flow.
INSV in ArabidopsisDead Leaves
INSV in ArabidopsisYellow Mid-Rib
INSV in ArabidopsisPurple Leaves
INSV in ArabidopsisRandom Death
INSV HandlingPlants testing positive for INSV will be immediately removed from growth spaces and destroyed. No new plants will be permitted in an infected space. Any plant to be removed from an infected space must be bagged before removal. Anyone working in an INSV infected space is to immediately exit the building when work is completed- they may return the next day.
BeneficialsN. cucumerisFeeds on Thrips larvae
BeneficialsHypoaspis milesFeeds on Thrips pupae and Fungus Gnat larvae
BeneficialsNematodesfeeds on Fungus Gnat larvae
Space Rotation It is critical to break the thrips lifecycle by enforcing a chamber clean out every 3 months.
All chambers in 005 Rightmire and in Biotech Support Facility are common shared space. Researchers requiring a chamber with special temp or daylength for a specific project will need to pre-arrange space with Gary.There will no longer be any continuous cycling in chambersall chambers will enter the rotation cycle.
Space Rotation DetailGrowth spaces will have a 6 week window for planting. This window may close sooner than 6 weeks IF space is full or INSV is detected. (Check for available space BEFORE planning to plant!)Spaces will have posted on them the last date for new plants. No new plants will be allowed in the space after the end date even if there is space available. No plants are permitted to move from one space to another. Once a space is empty, it will be cleaned by GH staff and heat treated for 4 days, then reopened for planting.
1Planting Window~6 weeksMaturation Window~6-7 weeksCleanoutPlanting Window2Planting WindowMaturation WindowClean out
Order of EntryOrder of entry is posted on the dry erase boards in the BSF and Rightmire 005. Information is updated weekly based on actual pest counts.Users should note these daily as they go about their work to make sure they are following the correct order of entry.Users who have entered a space lower on the list cannot enter or re-enter a space above it on the list until the next day.Dedicated lab coats are required for all growth spaces.