Citrus IPM News

California red scale is a key pest of citrus in the SJV. Its life cycle starts as crawlers produced by overwintering females from the past season. Crawlers move and find a suitable place to start feeding. Once they have settled, they do not move. Current degree-day accumulation since the March 1 biofix (base…

Early Bloom and Elevated Thrips Pressure in CitrusCitrus bloom has now ended across much of the San Joaquin Valley, nearly three weeks ahead of the historical average. In Tulare County, monitoring confirmed the presence of both immature and adult citrus thrips actively feeding on young fruit. This early…

Citrus Bloom Has Ended in the San Joaquin Valley, Citrus bloom has now been called by the counties across much of the southern San Joaquin Valley, including Kern County, Tulare County, and Fresno County. With petal fall behind us, orchards are entering one of the most critical windows for pest management,…

Citrus Bloom Declared Across San Joaquin Valley: What It Means for Thrips ManagementCitrus bloom has now been declared across the major growing regions of the San Joaquin Valley, with the first bloom observed in Kern County (March 12–19), followed closely by Fresno County (March 14–19) and Tulare County …

Citrus Thrips Field Day At Lindcove REC On April 7, 2026 EXTERNAL IMAGECitrus thrips remain a key pest affecting citrus fruit quality in California. Citrus thrips feeding on young fruit causes scarring and rind blemishes that reduce fruit quality and market value, especially for fresh-market citrus…