Landscape Fabric Blocks Diaprepes Larvae

Ernie NeffPests

Fabric mulch landscape covers, typically used to block weeds in nurseries, can aid in diaprepes root weevil control, Larry Duncan reported at the recent Citrus Expo. “Some of these products, not all of them, are extremely effective at blocking the diaprepes weevil larvae from getting into the soil” after falling from a citrus tree, Duncan said. Duncan is a University … Read More

Pest Prompts Revised Import Requirements

Ernie NeffPests, Trade

The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) on Aug. 20 revised the entry requirements for citrus fruit from the Districts of Riverina and Sunraysia in Australia. According to APHIS, the revision is necessary because both Riverina and Sunraysia no longer meet the requirements to be considered fruit fly-free areas for Queensland fruit fly (Bactrocera tryoni). … Read More

IPCs Help With Diaprepes and Nematodes

Ernie NeffPests

Florida citrus growers have known for several years that individual protective covers (IPCs) do a good job of excluding HLB-spreading Asian citrus psyllids from young trees. “But those protective covers also protect from things like Diaprepes abbreviatus,” researcher Larry Duncan told the recent Citrus Expo audience. Duncan is a nematologist at the University of Florida Institute of Food and Agricultural … Read More

Glassy-Winged Sharpshooter Making a Comeback?

Tacy CalliesCalifornia Corner, Pests

The glassy-winged sharpshooter (GWSS) is a pest that made California headlines from the late 1980s until its suppression at the turn of the new century. Unfortunately, it made a fast comeback in 2020, probably due to unusually warm winter weather. A warm winter and spring caused populations in the southern San Joaquin Valley to surge. Kern County traps showed a … Read More

Chilli Thrips a Potential Problem in CUPS

Tacy CalliesAll In For Citrus Podcast, CUPS, Pests

A modified way of producing citrus in Florida to protect against the Asian citrus psyllid may provide shelter for another pest — chilli thrips. Citrus under protective screen (CUPS) production systems protect against the psyllid and the huanglongbing (HLB) disease the pest transmits. However, according to University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) entomologist Lauren Diepenbrock, the … Read More

Snail Management: What Works

Tacy CalliesPests, Tip of the Week

By Lauren Diepenbrock In the past few years, several citrus growers have been impacted by yet another non-native pest in their groves. This time it is not an insect or mite; it’s a snail. Bulimulus sporadicus is a relatively new pest to Florida, first found in Duval County in 2009. It has quickly moved throughout much of the state, causing … Read More

Interplanting Improves Wasp Control

Ernie NeffPests

Lucerne (also known as alfalfa) interplanting improved citrus gall wasp (CGW) control in Australia’s New South Wales (NSW). The interplanting is practiced by some citrus growers in NSW to suppress weeds, reduce soil compaction and improve soil fertility. Jianhua Mo of the NSW Department of Primary Industries addressed the matter; a summary of Mo’s comments follows. One possible explanation is … Read More

Treating Pathogens Without Antibiotics

Ernie NeffDiseases, Pests

Federal researchers announced that they have found an innovative way to treat pathogens (harmful bacteria) and pests in citrus trees and potato and tomato plants without the use of antibiotics. The researchers are with the U.S. Department of Agriculture’s (USDA) Agricultural Research Service (ARS). The research was done in collaboration with the University of Florida and AUM LifeTech Inc. The … Read More

Mexfly Quarantine Area Removed

Ernie NeffPests

The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (USDA/APHIS) and the Texas Department of Agriculture (TDA) removed the Mexican fruit fly (Mexfly) quarantine area in Lasara in Willacy County, Texas. The quarantine removal was effective June 9. On Nov. 5, 2020, USDA/APHIS and TDA established a Mexfly quarantine in that area and restricted interstate movement of regulated … Read More

Mexfly Quarantine Area in Texas Reduced

Ernie NeffPests

Federal and state agriculture agencies on June 3 released portions of the Mexican fruit fly (Mexfly) quarantine in Cameron County, Texas. The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (USDA/APHIS) and the Texas Department of Agriculture (TDA) took the action after three pest lifecycles elapsed with no additional detections in the areas released from quarantine. Releasing the … Read More

California Reports Two Citrus Pests

Ernie NeffPests

The Citrus Pest & Disease Prevention Program in California recently detected sweet orange scab (SOS) in new areas of the state. Additionally, an unofficial lime swallowtail butterfly (LSB) sample was identified from Los Angeles County, and several LSB sightings have been reported in Los Angeles and San Luis Obispo counties. SWEET ORANGE SCABSOS is a cosmetic fungal disease that impacts … Read More

Research Update on Cover Crops and Nematicides

Tacy CalliesCover Crops, Pests

By Larry Duncan, Johan Desaeger and Homan Regmi Two field experiments were initiated in January 2019 to evaluate the efficacy of nematicides and cover crops for managing the sting nematode (Belonolaimus longicaudatus) in a replanted grove affected by huanglongbing (HLB). The trees were nearly two years old when perennial peanut (resistant to sting nematode) plots were established in row middles … Read More

CLM and Canker: Dangerous Summer Duo

Ernie NeffDiseases, Pests

Chris Oswalt details the connection between citrus leafminer (CLM) and citrus canker in the May/June Central Florida citrus Extension newsletter, Citrus from the Ridge to the Valley. He also offers some management tips. “I don’t think we can overstate the effect of leafminer damage on citrus foliage and the increased development of citrus canker lesions on damaged leaves,” the multi-county … Read More

Combating California Red Scale

Tacy CalliesCalifornia Corner, Pests

California red scale (CRS) is one of the key pests for growers in the San Joaquin Valley, home to 75% of the state’s citrus production. CRS is a sap-sucking insect that attacks all parts of citrus trees. It causes dieback of branches, yield loss and downgrading of fruit. According to Sandipa Gautam, University of California assistant research entomologist at the … Read More

Fruit Fly Pests of Florida Citrus

Ashley RobinsonPests

Exotic fruit flies are considered some of the most serious of the world’s agricultural pests due to their potential economic harm and threat to the food supply. They have a wide host range of fruit, vegetables and nuts. Most of Florida’s crops fall within the host range, including the fragile citrus industry. For this reason, it’s imperative to act quickly … Read More

Monitoring Citrus Root Weevils

Tacy CalliesPests, Tip of the Week

By Larry Duncan Soilborne larvae that feed on citrus roots are the damaging life stage of Diaprepes abbreviatus and Pachnaeus spp. (bluegreen) root weevils. Newly developed adult weevils, which emerge throughout the warm months of the year, also occur in soil.  A peak emergence of adults occurs at some point each spring or early summer. Less frequently, a smaller emergence … Read More

Scouting for Lebbeck Mealybugs

Tacy CalliesPests, Tip of the Week

By Lauren Diepenbrock Lebbeck mealybugs (Nipaecoccus viridis) have quickly made an impact on citrus groves in Central and South Florida since the pest was first found in 2019. While management techniques are still being studied, this article describes actions growers can take to find this pest before it becomes a problem. SOOTY MOLDLebbeck mealybugs excrete sugary honeydew, much like many … Read More

Citrus Leafminer Sampling Techniques

Tacy CalliesPests, Tip of the Week

By Xavier Martini Citrus leafminer (CLM) is a recurring pest in citrus groves that lays eggs on new growth shoots (flush). After hatching, larvae penetrate directly into the leaf and begin feeding on sap and leaving a serpentine mine in the leaf. CLM population dynamics are mostly driven by flushing pattern, with two flight peaks in early spring and late … Read More

Nematode Identification With AI

Ernie NeffPests

Parasitic nematode damage in agriculture totals $125 billion around the world each year. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers hope to alleviate some of that destruction. The UF/IFAS scientists will use artificial intelligence (AI) to try to more rapidly identify nematodes. Some nematodes live in the ground and harm plants, while others are beneficial, so … Read More

Managing Lebbeck Mealybug

Ashley RobinsonPests

University of Florida Institute of Food and Agricultural Sciences entomologist Lauren Diepenbrock provided an update on lebbeck mealybug during the 2021 Florida Citrus Growers’ Institute. The pest, first found in Florida commercial citrus in 2019, feeds on and damages citrus, causing up to 70% fruit drop in heavily infested groves. According to Diepenbrock, damaged fruit will not be marketable for … Read More