control

Combination of Essential Oils and Kaolin to Control Psyllids

Daniel Cooper HLB Management, Tip of the Week

By Xavier Martini and Romain Exilien  Despite intensive control efforts, the Asian citrus psyllid (ACP), the vector of Candidatus Liberibacter asiaticus, the bacteria causing citrus greening, remains the most devastating pest of citrus. The ACP typically relies on tactile, visual and odor cues to detect its host. By combining an irritant, a visual masking and a true repellent, University of Florida …

Reduce HLB Pressure and Enhance Growth With Kaolin

Josh McGill HLB Management, Tip of the Week

By Christopher Vincent Kaolin particle film is a non-toxic tool to reduce psyllids and increase tree growth. Particle films are nothing more than a suspension of solid particles that make a “film” on the leaves after they dry. They work mostly by reflecting light. Kaolin is the most common type of particle film because the clay is mined directly and …

Kaolin Helps With ACP and HLB

Ernie Neff HLB Management

According to researchers in Florida and California, kaolin clay, especially red kaolin, aids in the management of Asian citrus pysllids (ACP) and the HLB they spread, among other attributes. Christopher Vincent of the University of Florida Institute of Food and Agricultural Sciences and Monique Rivera of the University of California at Riverside recently presented a webinar about kaolin. The University …

Kaolin Particle Film Reduces HLB Pressure

Tacy Callies HLB Management

Researchers found use of kaolin particle film on trees reduced populations of HLB-spreading psyllids and delayed HLB infection. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor Christopher Vincent presented his research comparing red and white kaolin particle films with foliar insecticides during a recent UF/IFAS OJ Break webinar. According to Vincent, the particles of kaolin clay …

climate

Kaolin Particle Films for Citrus Under HLB Pressure

Tacy Callies HLB Management

Managing the Asian citrus psyllid (ACP) that spreads citrus greening disease (HLB) has become a crucial task at the forefront of much research. One management option that has proven to reduce ACP populations while increasing tree growth and yield is particle film. During the 2020 virtual Florida Citrus Industry Annual Conference, University of Florida Institute of Food and Agricultural Sciences …

climate

Kaolin Impact on Psyllids and HLB

Ernie Neff HLB Management, Psyllids

Researchers found use of kaolin particle film on trees reduced populations of HLB-spreading psyllids and delayed HLB infection. University of Florida Institute of Food and Agricultural Sciences researcher Christopher Vincent and graduate student Juanpablo Salvatierra Miranda report on their findings. Vincent says both white kaolin and red kaolin applications “had very low psyllid numbers” compared to a foliar insecticide treatment …

Kaolin Clay May Be Viable Option to Protect Citrus Trees from ACP

Daniel Cooper Citrus Greening, Industry News Release, Psyllids, Research

Florida citrus growers have begun taking notice of kaolin clay, a powdery white compound, because it can cause Asian citrus psyllids (ACP) to “not take notice” of their groves. Long used to protect other fruit and vegetable crops, kaolin can also conceal citrus trees from hungry psyllids by confusing their visual sensory system, said Michael Rogers, director of the Citrus …

climate

For Psyllids, Kaolin Clay Beats Foliar Insecticides

Ernie Neff HLB Management, Psyllids

University of Florida Institute of Food and Agricultural Sciences researcher Christopher Vincent says kaolin clay outperforms foliar insecticides for management of HLB-spreading psyllids at times when kaolin’s use is practical. His presentation on the topic followed the Citrus Research and Development Foundation (CRDF) meeting on May 22 at the Citrus Research and Education Center in Lake Alfred. The presentation, part …

climate

Using Kaolin Against HLB-Spreading Psyllids

Daniel Cooper HLB Management, Psyllids

Researchers are trying to use all available tools to control HLB-spreading psyllids, says entomologist Michael Rogers with the University of Florida Institute of Food and Agricultural Sciences. Rogers, director of the Citrus Research and Education Center in Lake Alfred, says scientists want “to show that we can actually grow citrus in the age of HLB and still be profitable.” “The …

particle films

Protect Trees With Particle Films

Daniel Cooper HLB Management, Tip of the Week, Weather

By Christopher Vincent Particle film is a useful tool to take the edge off stress to citrus trees caused by weather and HLB. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) research over the past several years shows moderate concentrations of kaolin particle films cause trees to grow faster, suffer less water loss and keep leaves cooler, even …

cycle 2

California’s CRaFT Accepting Cycle 2 Applications

Daniel Cooper California Corner, Psyllids

California’s Citrus Research and Field Trials (CA-CRaFT) program is now accepting Cycle 2 applications from commercial growers. This initiative aims to showcase the efficacy of additional control measures against the Asian citrus psyllid (ACP). ACP is the carrier of the Candidatus Liberibacter asiaticus bacterium causing huanglongbing (HLB) disease in citrus. For Cycle 2, applications will be accepted until program capacity …

Increase Yield With Shade

Josh McGill Production, Tip of the Week

By Christopher Vincent, Yu Wang and Nabil Killiny  Mild shade reduces stress, increases growth and yield, and may improve pest management under huanglongbing (HLB). It reduces high temperature and water stresses. Shade also may reduce HLB transmission by making trees less visible to Asian citrus psyllids (ACP). Shaded trees have less ACP, and shade appears to reduce the severity of …

Brazil’s Public and Private Sectors Tackle Greening

Josh McGill Brazil, HLB Management

Representatives of the Brazilian private citrus sectors of São Paulo and Minas Gerais met Sept. 25 with members of São Paulo’s government to formulate joint action plans against citrus greening disease. Representing the private sector in the meeting were Fundecitrus, Brazilian Table Citrus Association, Vivecitrus, Citrus Consultants Group and Technical Assistance and Consultancy Group in Citrus. The government of the …

Young Tree Establishment Tools Compared

Josh McGill Citrus Expo, HLB Management

By Ernie Neff New tools available to aid in establishment of young citrus groves all have pros, cons and unknowns, entomologist Lauren Diepenbrock told a Citrus & Specialty Crop Expo audience in August. Diepenbrock is an entomologist and assistant professor with the University of Florida Institute of Food and Agricultural Sciences. She opened her presentation by saying insecticides alone are …

HLB Tools for Today and Tomorrow

Josh McGill Citrus Expo, HLB Management

By Frank Giles and Tacy Callies The Citrus & Specialty Crop Expo hosted two citrus educational sessions during the Aug. 16–17 event held at the Florida State Fairgrounds in Tampa. The sessions included both long-term research aimed at delivering trees resistant to HLB as well as what growers can do today to help mitigate the effects of the disease in …

Stress Factors and Hurricane-Damaged Trees

Josh McGill hurricane

By Syed Bilal Hussain, Rachel Gearhart, G. Zeng Michalzcyk and Christopher Vincent Hurricane Ian in 2022 caused significant damage to Florida citrus groves. Even groves that experienced only Category 1 winds have begun to decline as the weather has warmed. Signs of canopy decline include branch dieback and leaf drop. Branches with new growth are also experiencing leaf drop. These …

cycle 2

Help Trees Weather Heat With Particle Film

Josh McGill Tip of the Week, Weather

By Sharpton Toussaint and Christopher Vincent Kaolin particle film is a promising grove management technique for pest control and growth enhancement. The optimal rates to use to improve water use and growth in citrus trees remain an important area of investigation. Citrus leaves are prone to water deficits because they transpire more water than the stems can supply. University of …

Two Ways to Treat Ian-Stressed Trees

Josh McGill hurricane, Irrigation, Tip of the Week

Give trees a bit of relief with frequent irrigation and kaolin particle film. By Christopher Vincent Hurricane Ian caused damage to orange trees, knocking fruit on the ground, twisting and breaking limbs, stripping leaves off trees and flooding soil. Although lots of damage was visible immediately, the after-effects will continue to rear their ugly heads in the months to come, …

How Different Techniques Hold Up to Diseases

Josh McGill Citrus Expo, Diseases, IPCs

How well reflective mulch, kaolin clay and individual protective covers (IPCs) hold up to HLB, canker and greasy spot diseases was researcher Megan Dewdney’s topic at the 2022 Citrus & Specialty Crop Expo. Dewdney is a University of Florida Institute of Food and Agricultural Sciences associate professor of plant pathology at the Citrus Research and Education Center.  The research project …

Focused on Finding Solutions

Josh McGill Research

By Michael Rogers As we approach a new citrus-growing season, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers and Extension agents working throughout the state renew their focus on finding solutions that growers can use in the short term to sustain their operations. While we value our longer-term research projects, efforts that provide tangible applications that …