Bureau of Citrus Budwood Registration
3027 Lake Alfred Rd. (US 17)
Winter Haven, FL 33881
863.298.7712
Bureau Chief: Michael Kesinger Michael.Kesinger@freshfromflorida.com
Budwood Definitions
[A] (B) (C) (D) (E) (F) (G) (H) (I) [J] [K] (L) [M] (N) [O] (P) (Q) (R) (S) (T) [U] (V) [W] (X) [Y] [Z]- B
- Budwood.
- A portion of a stem or branch with a vegetative bud(s) used in propagation for budding or grafting.
- Bureau of Citrus Budwood Registration.
- The Bureau of Citrus Budwood Registration is an agency of the Florida Department of Agriculture & Consumer Services, Division of Plant Industry that administers a program to assist growers and nurserymen in producing citrus nursery trees that are believed to be horticulturally true to varietal type, productive, and free from certain recognizable bud-transmissible diseases detrimental to fruit production and tree longevity.
- C
- Certified laboratories.
- Public or private laboratories approved by the department to perform tests for citrus pathogens as required in Rule 5B-60, using accepted standardized methods as contained in Graft-transmissible Diseases of Citrus: Handbook for detection and diagnosis (more particularly identified in 5B-60.004).
- Citrange stunt.
- See Tatterleaf virus.
- Citrus.
- All species of the genera Citrus, Poncirus, and Fortunella including any hybrids thereof.
- Citrus blight.
- A root graft-transmissible disease of unknown etiology associated with xylem dysfunction which results in wilting and slow decline of trees.
- Citrus Budwood Foundation Grove.
- Plantings of pathogen-tested citrus trees, maintained by the Bureau of Citrus Budwood Registration, representing major
commercial varieties and rootstocks for the purposes of horticultural observation and distribution of budwood to Florida growers. - Citrus Budwood Protection Program.
- A mandatory program administered by the Bureau of Citrus Budwood Registration whereby nurserymen, growers and other people propagating citrus, including all dooryard, own-use and commercial plantings, are required to propagate citrus in accordance with Rule 5B-60.
- Citrus Budwood Technical Advisory Committee.
- The mission of the Citrus Budwood Technical Advisory Committee is to provide oversight to programs designed to acquire, maintain, and distribute quality sources of citrus germplasm.
- Citrus cachexia viroid (xyloporosis).
- A graft-transmissible viroid that causes phloem deterioration and blockage in many mandarin, mandarin hybrids, Citrus macrophylla, Wester, Rangpur lime, and sweet lime. This disease causes decline, stunting, and crop reduction.
- Citrus exocortis viroid.
- A graft-transmissible pathogen causing tree decline, stunting of growth, scaling and shelling of the rootstock bark of Poncirus trifoliate and many P. trifoliate hybrids and Rangpur lime.
- Citrus tristeza virus.
- A graft-transmissible closterovirus which continues to expand its geographic range both by aphid vectors
(primarily brown citrus aphid) and by graft propagation using infected budwood. Severe strains, as opposed to mild strains, of the virus cause severe stem pitting, seedling yellows, or quick decline on sour orange rootstock which result in reduced crops or loss of trees. - Citrus viroids.
- Viroids in groups I, II, III, and IV, in addition to citrus exocortis viroid and citrus cachexia viroid (xyloporosis).
- Clone.
- An asexually reproduced cultivar; a group of genetically uniform plants that have been propagated vegetatively from a single original plant.
- Commercial citrus nursery stock.
- Citrus nursery stock to be used in or for establishing a planting of 40 or more citrus trees.
- Concave gum/blind pocket.
- Graft-transmissible pathogens causing infected trees to have concavities in the trunk and main branches. The disease is found in most citrus-growing areas where it reduces yield and tree vigor.
- Cooperating agencies.
- The University of Florida and the United States Department of Agriculture shall be regarded as cooperating agencies.
- D
- Decline.
- A tree that is unthrifty and shows receding vigor, and/or has a significant amount of dieback.
- Dooryard citrus nursery stock.
- Citrus plants to be used only in a residential setting or for establishing a planting of less than 40 citrus trees.
- Dooryard source tree.
- A citrus tree that has met all of the requirements of Rule 5B-60.006(4)(a) and has been registered with the department.
- E
- Exocotis.
- See Citrus exocortis viroid.
- F
- Florida Citrus Arboretum.
- A collection of citrus and citrus relatives maintained as a repository of valuable specimen plants available for horticultural research and education.
- Foundation grove.
- See Citrus Budwood Foundation Grove.
- Florida gummosis.
- A disease of unknown etiology characterized by bark cracks and gumming of scions. This disease is called Rio Grande gummosis in Texas and ferment gum disease in California.
- Foundation tree.
- A citrus tree owned and maintained by the department in accordance with 5B-60.008 that is used for horticultural evaluation and to provide a source of budwood to nurserymen, primarily for establishing scion and increase trees.
- G
- Graft-transmissible pathogens.
- Disease agents spread by vegetative propagation. This general term includes known viruses, viroids, bacteria, spiroplasma, and other non-identified virus-like pathogens of citrus.
- Gummosis.
- See Florida gummosis.
- H
- Heterozygous.
- Produce offspring from sexual reproduction which are not always "true-to-type".
- Horticulturally true-to-type.
- A plant which conforms to the description of a particular cultivar and which is from the same genetic line of descent as that cultivar.
- Hybrids.
- Citrus variety which are heterozygous as a result of either natural or artificially induced interbreeding of unlike parents.
- I
- Increase trees.
- Specially designated nursery propagations made to rapidly multiply supplies of propagative material for citrus nursery tree production and meeting all the requirements of Rule 5B-60.010.
- L
- Leprosis.
- A graft-transmissible disease presumably caused by a mite-vectored bacilliform virus. Severe disease can cause crop loss and tree debilitation.
- N
- Nucellar Embryony.
- Embryos that develop asexually by division of the nucelus and produce seedlings with traits identical to that of the seed parent.
- P
- Parent tree.
- A mature bearing citrus tree that has met all of the requirements of Rule 5B-60.007 and has been registered with the department.
- Progeny nursery tree.
- A citrus nursery tree produced from budwood from a registered source tree in accordance with instructions outlined in Rule 5B-60.
- Propagative material.
- Any live plant material used to produce nursery stock, including cuttings, budwood, seeds, seedlings, air layers, and tissue culture.
- Psorosis.
- A complex of viruses (psorosis-A, psorosis-B, and ringspot) that induce bark-scaling, internal wood staining, ringspots or
irregular chlorotic patterns in the foliage, and/or eventual tree decline. The disease is spread primarily by propagation using infected budwood. - Q
- Quick decline.
- See Citrus Tristeza Virus.
- R
- Registration.
- The process of certifying source trees as being virus-tested and meeting the requirements of Rule 5B-60. Renewed annually by notification and fee payment.
- Registration pending.
- Early propagation from source trees prior to the confirmation of all test results.
- Rootstock.
- A plant used as the recipient understock in budding or grafting.
- Rule 5B-60.
- Chapter 5B-60 of the RULES OF THE DEPARTMENT OF AGRICULTURE AND CONSUMER SERVICES DIVISION OF PLANT INDUSTRY that outlines the CITRUS BUDWOOD PROTECTION PROGRAM
- S
- Scion tree.
- A citrus tree grown in accordance with Rule 5B-60.009 from budwood taken from a registered parent tree or Citrus Budwood Foundation Grove or Florida Citrus Arboretum tree and registered with the department as a source of budwood.
- Seed source tree.
- A tree that supplies seed for propagation which has been determined by the department as being apparently horticulturally true-to-type, and if of the genus Poncirus or its hybrids has been tested once at the owner's expense and found free of psorosis unless propagated from a foundation tree.
- Severe strains of citrus tristeza virus.
- Severe strains of citrus tristeza virus will be determined by the department with input from the Citrus Budwood Technical Advisory Committee as to which strains are regulated and which techniques are approved for testing.
- Source Tree.
- A citrus tree that has met all of the requirements as a source of budwood or propagative material, i.e., a parent tree, scion tree, increase tree, foundation tree, dooryard source tree, validated tree, or seed source tree.
- T
- Tatterleaf virus.
- A viral disease of citrus, sometimes called citrange stunt, which affects trees on trifoliate orange or trifoliate orange hybrid rootstocks.
- Tests.
- Standardized laboratory, biological greenhouse or field plot tests for certain graft-transmissible pathogens before trees are eligible for registration as source trees as contained in Graft-transmissible Diseases of Citrus: Handbook for detection and diagnosis, or approved by the Citrus Budwood Technical Advisory Committee.
- V
- Validated tree.
- A citrus tree validated as having an annual citrus tristeza virus test. This classification allows growers the flexibility of utilizing trees that do not have complete graft-transmissible pathogen indexing on a temporary basis, until the grower has time to establish registered sources.
- X
- Xyloporosis.
- See Citrus cachexia viroid.
