Another year and another successful greenhouse and nursery workshop here in Overton. We had many great speakers and are very grateful for our sponsors. I have included some summaries and resources from some of our speakers down below. I have created links below that will direct you to information pertinent to each speaker below. In the case where the speaker has given consent to share their presentation, I have also included that too.
This post is a part of a series of notes taken at the International Organization of Biological Control 2017.
Foraging and egg-laying behaviour of the coccinellid predator Rhyzobius lophanthae
Marjolein Kruidhof, Wageningen University & Research, BU Greenhouse Horticulture
- Diaspis boisduvalii scales in cymbidium; major problem in Netherlands and they don’t know what to do anymore to control
- Due to restrictions of use of chemicals (i.e. neonics), they have been unable to control the scale
- Cage experiment; comparison of different natural enemies of Diaspis boisduvalii scales
- Tried 8 different treatments, different release rates and frequencies of release of Rhyzobius lophanthae larvae or adults (with or without ephestia eggs)
- In control, plant was covered with the scale at the end (5 weeks later)
- When releasing R. lophanthae adults and ephestia eggs, got excellent control
- R. lophanthae is a predatory beetle
- Adults are about 2.5mm in small
- Specialist predators of the Diaspididae family
- Lays eggs under the shields of adult female scales