In this quarter, monitoring and management activities continued in all of the Integrated Pest Management (IPM) programs for ACP which include: 1. conventional and organic insecticides plus biological control, 2. organic insecticides, and Horticultural Mineral Oil (HMO) plus biological control, 3. conventional insecticides plus biological control 4. HMO plus biological control. 5. biological control only. The dormant spray applications in February included Danitol in programs 1 and 3, Pyganic + 435 oil (2%) in program 2, and 435 oil (2%) in program 4. The March sprays included Microthiol in program 1, 435 oil (2%) in program 2 and 4, and Movento in program 3. Nine samplings were conducted to monitor for ACP and beneficial arthropods. February sprays conducted in the middle of the month kept psyllids below treatment threshold of 0.1 adults per tap sample across all programs until the second week of March. After March sprays a decreasing trend in the populations of ACP was seen in all programs and numbers dropping from 0.2-0.3 adults per tap sample to 0.1 adults per tap sample by the end of the month. Within the predator guild, spiders and lacewings continue to be the dominant groups and among lacewings Ceraeochrysa cubana most dominant. In the laboratory, C. cubana larvae were more tolerant to imidacloprid than C. claveri or D. citri. Ceraeochrysa cubana seems to have a significant potential to be used in biological control against D. citri. A preliminary laboratory study testing a predator prey ratio of 1:1 (mite: ACP egg) showed that the predatory mite Amblyseius swirskii provided 50% reduction in ACP. Follow up experiments were initiated in the greenhouse using different densities of this predator against ACP. Residual toxicity of March sprays was evaluated against A. swirskii. Three days after sprays leaves were collected from the treated trees and exposed to the predatory mite in the experimental arenas in the laboratory. After, 24 h of exposure 12% mortality was observed in the Movento treatment, and 8% in the Microthiol and 435 oil treatments. Amblyseius swirskii were also released in the field within a week of March sprays. Approximately 5,000 mites per plot and total of 20,000 per program were released. No predatory mites were observed in a sample conducted before the release. After release, 20% of the sampled trees in program 3 sprayed with Movento were found to contain predatory mites, 30-32.5% in the program 2 and 4% sprayed with 435 oil, 35% in program 1 sprayed with Microthiol and 40% in the program 5 which is untreated control. Colonies of field collected ACP from all programs were established in the laboratory and their subsequent generations tested for tolerance to dimethoate, fenpropathrin, and imidacloprid in comparison with a laboratory colony. The concentration required to kill 50% of the field population averaged 2, 4 and 8 times more for dimethoate, fenpropathrin, and imidacloprid, respectively, than the concentration required to kill same percentage of ACP from the laboratory colony. Leaf samples were collected from all programs and submitted for HLB analysis in March. Analysis of the leaves collected in Fall 2020 showed that 80-95% samples collected across all programs were HLB positive. Although, no Tamarixia radiata was released in the programs during this quarter due to the problems with the colonies at the FDACS-DPI, Dundee, facility, the previous work on the parasitism activity of T. radiata tested at different times of the day and temperatures was written and a presentation on the same work given at the Southeastern Branch Meeting of the Entomological Society of America and Florida Citrus Grower Institute.