Johan Desaeger

0000-0001-5121-5691

Meloidogyne hapla, the Northern Root-Knot Nematode, in Florida Strawberries and Associated Double-Cropped Vegetables

J. Desaeger

Nematodes Parasitizing Hops in Florida

Johan Desaeger

Nematode Management in Tomatoes, Peppers, and Eggplant

J. W. Noling

Plant parasitic nematodes are small microscopic roundworms that live in the soil and attack the roots of plants. Crop production problems induced by nematodes, therefore, generally occur as a result of root dysfunction, reducing rooting volume and foraging and utilization efficiency of water and nutrients. Many different genera and species of nematodes can be important to crop production in Florida.

Non-Fumigant Nematicides Registered for Vegetable Crop Use

T. T. Watson and J. A. Desaeger

Non-fumigant nematicides are formulated as liquids or granules that are moved through the soil by water. This 4-page fact sheet written by T. T. Watson and J. A. Desaeger and published by the UF/IFAS Entomology and Nematology Department is a major revision. It was first published in 1999 and most recently revised in April 2019. The fact sheet lists and describes chemical and biological non-fumigant nematicides and provides some information about how these products work against nematode pests.

An Introduction to Economic Analysis of Pest Management: A Case Study of Nematode Management

By Yi Li, Yetian Cai, Weizhe Weng, Johan Desaeger, and Zhengfei Guan

The economic performance of pest management practices is a critical factor when farmers make adoption decisions. Partial budget analysis is a widely used tool to evaluate the financial effects of different management practices in agricultural production. It provides an economic rationale for selecting the optimal treatment by evaluating the cost-effectiveness of the treatment. This publication explains how to employ partial budget analysis using a real-world example. It provides a step-by-step guide examining the costs and benefits of two different approaches, fumigation and nematicides, to manage nematodes on Florida's tomato farms.

‘Lava Glow’—A New Red Fancy-Leaved Caladium Cultivar

Zhanao Deng, Natalia A. Peres, and Johan Desaeger

‘Lava Glow’ is a new and novel caladium cultivar that produces bright red to red-purple heart-shaped leaves with strong sunburn tolerance and is resistant to leaf spot diseases. This new 7-page publication of the UF/IFAS Environmental Horticulture Department is prepared for growers who are interested in growing caladium as a horticultural crop and for greenhouse or nursery growers who are interested in producing potted caladium plants. Written by Zhanao Deng, Natalia A. Peres, and Johan Desaeger.

Chapter 12. Onion, Leek, and Chive Production

Johan Desaeger, Peter J. Dittmar, Pamela D. Roberts, Xavier Martini, and Lincoln Zotarelli

Chapter 12 of the Vegetable Production Handbook of Florida

Rice Root-Knot Nematode Meloidogyne graminicola (Nematoda: Chromadorea: Tylenchida: Meloidogynidae: Meloidogyne)

Hung X. Bui, Clemen J. Oliveira, Johan A. Desaeger, and Nathan E. Schroeder

The Featured Creatures collection provides in-depth profiles of insects, nematodes, arachnids and other organisms relevant to Florida. These profiles are intended for the use of interested laypersons with some knowledge of biology as well as academic audiences.

Chapter 4. Integrated Pest Management

Peter J. Dittmar, Nicholas S. Dufault, Johan Desaeger, Jawwad Qureshi, Nathan S. Boyd, and Mathews L. Paret

Chapter 4 of the Vegetable Production Handbook of Florida

Chapter 9. Leafy Vegetable Production

Germán Sandoya-Miranda, Ramdas Kanissery, Nicholas S. Dufault, Johan Desaeger, Anna Meszaros, Julien Beuzelin, Katia Viana Xavier, and Dennis C. Odero

Chapter 9 of the Vegetable Production Handbook of Florida

Chapter 16. Strawberry Production

Vance M. Whitaker, Nathan S. Boyd, Natalia A. Peres, Johan Desaeger, Sriyanka Lahiri, and Shinsuke Agehara

Chapter 16 of the Vegetable Production Handbook of Florida

Chapter 19. Biopesticides and Alternative Disease and Pest Management Products

Natalia A. Peres, Gary E. Vallad, Johan Desaeger, and Sriyanka Lahiri

Chapter 19 of the Vegetable Production Handbook of Florida

Nematode Management in Cucurbit Crops

Johan Desaeger, Hung X. Bui, and Joseph W. Noling

Plant-parasitic nematodes are small microscopic roundworms that live in the soil and attack the roots of plants. Crop production problems induced by nematodes therefore generally occur as a result of root dysfunction; nematodes reduce rooting volume and the efficiency with which roots forage for and use water and nutrients. Many different genera and species of nematodes can be important to crop production in Florida. In many cases a mixed community of plant-parasitic nematodes is present in a field, rather than having a single species occurring alone. Most cucurbits are extremely susceptible to root nematodes and also are often damaged by sting nematodes; other nematodes occasionally cause some losses.

Plant-Parasitic Nematodes Associated with Asian Vegetables in Florida

Hung X. Bui and Johan A. Desaeger

Root-knot nematodes (Meloidogyne spp.) are one of the main soilborne pathogens in Florida and cause considerable damage to many vegetables. Asian vegetables are important specialty crops in Florida, but no information is available on their hosts status to plant-parasitic nematodes, in particular to Meloidogyne spp. Therefore, we conducted a survey to learn what Asian vegetables are grown in Florida, the plant-parasitic nematodes associated with these crops, and the damage these nematodes could potentially cause to Asian vegetables.

Using Supplemental Lighting to Grow Hemp in Florida

J. Desaeger, J. Coburn, and S. Agehara

With the removal of hemp from the controlled substances list, hemp is now one of the emerging crops in Florida. There is limited information on how to grow this crop in Florida. Like hops, hemp is another recently introduced crop in the state, with one of the major yield-limiting factors of premature flowering induced by inadequate day length. This article provides guidelines for hemp growers in Florida on the use of supplemental lighting to control flowering and improve growth of hemp under Florida’s environmental conditions. Written by Johan Desaeger, Jacqueline Coburn, and Shinsuke Agehara, and published by the UF/IFAS Horticultural Sciences Department; 4 pp.

Chapter 18. Tomato Production

Craig Frey, Ramdas Kanissery, Jawwad Qureshi, Johan Desaeger, and Gary E. Vallad

Chapter 18 of the Vegetable Production Handbook of Florida

Chapter 5. Ethnic Vegetable Production

Guodong Liu, Bonnie Wells, Yuncong Li, Qingren Wang, Johan Desaeger, and Xiaoying Li

Chapter 5 of the Vegetable Production Handbook of Florida

Chapter 14. Potato Production

Lincoln Zotarelli, Peter J. Dittmar, Pamela D. Roberts, Johan Desaeger, Prissy Fletcher, and Bonnie Wells

Chapter 14 of the Vegetable Production Handbook of Florida

Chapter 6. Cole Crop Production

Lincoln Zotarelli, Peter J. Dittmar, Nicholas S. Dufault, Johan Desaeger, Prissy Fletcher, Qingren Wang, and De-Fen Mou

Chapter 6 of the Vegetable Production Handbook of Florida

Chapter 15. Root Crop Production

Julien M. Beuzelin, Peter J. Dittmar, Johan Desaeger, Lincoln Zotarelli, Shouan Zhang, Qingren Wang, Craig Frey, and Anna Meszaros

Chapter 15 of the Vegetable Production Handbook of Florida

Chapter 11. Legume Production

Craig Frey, Peter J. Dittmar, Dakshina R. Seal, Jawwad Qureshi, Shouan Zhang, Johan Desaeger, and Qingren Wang

Chapter 11 of the Vegetable Production Handbook of Florida

Root-Knot Nematode Management in Caladium

Mengyi Gu and Johan A. Desaeger

Florida leads the commercial production of caladiums, a popular ornamental. In Florida, root-knot, sting, and stubby root nematodes are found in caladium fields. Root-knot nematodes are considered the most important of all pests in caladiums that are grown in sand. This publication will help caladium growers understand what plant-parasitic nematodes are and current nematode management strategies for the caladium industry.

Chapter 13. Pepper Production

Craig Frey, Eugene J. McAvoy, Johan Desaeger, Gary E. Vallad, Jawwad Qureshi, and Nathan S. Boyd

Chapter 13 of the Vegetable Production Handbook of Florida

Guava Root-Knot Nematode or Pacara Earpod Root-Knot Nematode Meloidogyne enterolobii (Yang and Eisenback, 1983) (Nematoda: Chromadorea: Rhabditida: Tylenchina: Tylenchomorpha: Tylenchoidea: Meloidogynidae)

Chang Liu, Zane. J. Grabau, and Johan Desaeger

The Featured Creatures collection provides in-depth profiles of insects, nematodes, arachnids and other organisms relevant to Florida. These profiles are intended for the use of interested laypersons with some knowledge of biology as well as academic audiences.

Chapter 10. Minor Vegetable Crop Production

Dakshina R. Seal, Qingren Wang, Ramdas Kanissery, Anna Meszaros, Crystal A. Snodgrass, Julien Beuzelin, Johan Desaeger, Nicholas S. Dufault, Katia Viana Xavier, and Shouan Zhang

Chapter 10 of the Vegetable Production Handbook of Florida

Nematode Resistance: A Useful Tool for Root-Knot Nematode (RKN) Management in Tomato

Homan Regmi and Johan Desaeger

A UF/IFAS numbered peer reviewed Fact Sheet. in support of UF/IFAS Extension program: Integrated Pest Management

Foliar or Bud Nematodes in Florida Strawberries

J. Desaeger and J. Noling

A UF/IFAS numbered publication. in support of UF/IFAS Extension program: Integrated Pest Management

Chapter 17. Sweet Corn Production

Katia Viana Xavier, Ramdas Kanissery, Craig Frey, Anna Meszaros, Nicholas S. Dufault, Johan Desaeger, Jawwad Qureshi, and Julien Beuzelin

Chapter 17 of the Vegetable Production Handbook of Florida

How to Differentiate between Causes of Strawberry Plant Damage: Chilli Thrips, Spider Mites, Foliar Nematodes, or Phytotoxicity from Herbicides?

Lovely Adhikary, Sriyanka Lahiri, Nathan Boyd, and Johan Desaeger

This publication aims to provide information on how to differentiate damage caused by chilli thrips, spider mites, foliar nematodes, and phytotoxicity due to herbicide application on strawberry plants. The symptomology of these pests and the effects of phytotoxicity from herbicides can look similar, especially when microscopic pests are involved. Correctly identifying the cause behind each damage symptom is essential. The intended audience of this article is strawberry growers, crop scouts, Extension agents, and industry personnel working on improved production and management of strawberries.

Chapter 7. Cucurbit Production

Craig Frey, Nathan S. Boyd, Qingren Wang, Johan Desaeger, Jawwad Qureshi, Anna Meszaros, Nicholas S. Dufault, Pamela D. Roberts, and Xavier Martini

Chapter 7 of the Vegetable Production Handbook of Florida

Chapter 8. Eggplant Production

Pamela D. Roberts, Craig Frey, Anna Meszaros, Nathan S. Boyd, Johan Desaeger, and Jawwad Qureshi

Chapter 8 of the Vegetable Production Handbook of Florida

Nematode Management in Okra

J. W. Noling

Plant-parasitic nematodes are small microscopic roundworms that live in the soil and attack the roots of plants. Crop production problems induced by nematodes therefore generally occur as a result of root dysfunction; nematodes reduce rooting volume and the efficiency with which roots forage for and use water and nutrients. Many different genera and species of nematodes can be important to crop production in Florida. In many cases a mixed community of plant-parasitic nematodes is present in a field, rather than having a single species occurring alone. Okra is infamous for its susceptibility to root-knot nematodes; it is also extremely sensitive to sting nematodes. Because of this, okra should not be planted in land known to have severe problems with these nematodes in recent crops.

Solarization for Pest Management in Florida

Romy Krueger and Robert McSorley

ENY-902, a 9-page illustrated fact sheet by Romy Krueger and Robert McSorley, describes this soil management practice that is typically carried out during the warm summer months to benefit crops grown in the following fall — how it works, technical advice, affected organisms, integrating soil fertility, and considerations/drawbacks. Includes references.

Introduction to Soil Solarization

Robert McSorley and Harsimran K. Gill

ENY062 describes this practice of covering soil surface with plastic to harness the sun’s heat to manage soil weeds, nematodes, diseases, and insects in soil. The authors answer frequently asked questions and outline steps for conducting soil solarization. Includes references.