SUGARBEET.PULLMAN.2022.GREENHOUSE

Beta grown in greenhouse since 2022

Descriptor data collected from plants grown for seed increase. Annual plants were directly transplanted into the greenhouse and grown until seed harvest. Biennial and perennial plants were transplanted and vernalized after vegetative growth had sufficient sized rosette and root development. After vernalization, all plants were grown in greenhouses with day temperatures set between 15.5 C (60 F) and 18.3 C (65 F). All plants were planted using PRO-MIX BX MYCORRHIZAE in 2-gallon pots (6-inch pots were used for most annual accessions) and given greater than 16 hour day lengths (supplemented with a combination of LED, high pressure sodium, and metal halide lights). Once bolting was initiated plants were fertilized every 7-10 days with 10-30-20 (N-P-K) Blossom Booster fertilizer and STEM micronutrients (11 1/3 tbsp fertilizer and 1/4 tsp. STEM /gallon for use with 15:1 Hozon siphon mixer). Vernalization protocol was as follows:

First venalization was of 10-12 week old seedlings in rootrainersTM (in POR-MIX BX media) for a minimum of 4 months at 4 C with 12 hours of light and watered as necessary.

Subsequent re-vernalizations were of adult plants, trimmed and cleaned of debris, in 2-gallon pots for a minimum of 4 months at 4 C, 12 hours of light, and watered as necessary.

Some accessions require 2 or more re-vernalizations for the entire population to flower.

If bolted plants produced a good quantity of seed, they were thrown out. Only non-bolted plants were revernalized. If bolted plants did not produce a good quantity of seed, all plants were saved and revernalized. Bolting 2 data is the percentage of plants vernalized.

Erysiphe

Descriptor data collected from plants grown for seed increase in the greenhouse.Ratings for Erysiphe susceptibility were made based on natural infection. No inoculations were made.