Written by Louis Nottingham and Katlyn Catron, August 9, 2021 Introduction Data showing efficacy of insecticides against leafhopper vectors of x-disease is still relatively sparse. To address this, we performed two lab bioassays to screen insecticide products against Colladonus montanus reductus, the most abundant leafhopper vector of x-disease found in Washington cherries. We evaluated insecticides […]
Pear Phenology Update, August 9, 2021 Pear Psylla’s Current Status: The 2nd generation of summerform adults are at or past peak in most regions. Young nymphs of the 3rd generation are nearing peak and increasing. Hardshells of the 3rd generation are within the first 25% and rising. If biocontrol is present in orchards (IPM and […]
How to Sample for Pear Psylla Using Beat Trays Louie Nottingham demonstrates how to sample for pear psylla using the tray tap method, also known as the beat tray method. You will need an 18″ x 18″ beat tray (DYI or available for purchase at some ag chemical companies), a tapping stick and a sampling […]
June 22, 2021 Principal Investigator or CFO? Unpacking the PI Conundrum with Basic Economic Theory by Louis Nottingham This article was originally published in the Summer 2021 edition of “American Entomologist” https://doi.org/10.1093/ae/tmab028 As a relatively new research faculty member, coming to grips with the true nature of running a lab has been something of an […]
June 7, 2021 Pear Psylla’s Current Status: Old nymphs (hardshells) from the first generation are still present but declining. Summerform adults and eggs are rapidly building in cooler locations (Cashmere) and nearing peak at 1500DD in warmer ones (Medford). Early instar nymphs of the second generation are building in all locations, and will peak at […]
June 1, 2021 Pear Psylla’s Current Status: Some old nymphs from the first generation are still present but declining. Summerform adults and eggs are building in orchards (about 25-30% of the peak population are now present). Adults and eggs will increase until the peak at 1500 DD. Early instar nymphs of the second generation are […]
May 18, 2021 A phenology model for pear psylla was recently developed by Dr. Vince Jones. This model predicts the relative number of pear psylla from each life stage occurring as degree days are accumulated. Below is a graph showing the psylla degree day model and the status of psylla development on May 6th 2021. […]
May 18, 2021 Prior to this project, there was no available experimental information on insecticide toxicity against the leafhopper X-disease vectors Colladonus Reductus and C. geminatus In 2020 we performed lab bioassays to screen various insecticide products against the most abundant of these two species in Washington cherries, C. reductus. Five insecticide materials achieved 100% […]
May 18, 2021 First Generation Adults are Starting to be Active First generation adults from leafhopper vectors of X-disease phytoplasma including C. reductus and C. geminatus started being found in traps the week of May 10, 2021. Generally, second generation leafhoppers are of higher concern as first generation leafhoppers are often controlled by your standard […]