Guidelines for Interpreting, Establishing or
Changing
Plant Health and
California Department of Food and Agriculture
The California Food and
Agricultural Code mandates that, the California Department of Food and
Agriculture (CDFA) shall prevent the introduction
and spread of injurious insect or animal pests, plant diseases, and noxious
weeds. This statutory duty requires
a pest policy which recognizes that organisms vary in their potential and actual
harm to the
agriculture and environment of California. Overall
pest significance is based on the probability of spread of the pest, the
potential economic damage, the presence of host species, the favorability of the
climate and other factors. Pest ratings are based on that evaluation and provide the basis for determining what pest prevention activities
are appropriate, at what level, and when and where those activities should be
conducted.
(i)
(ii)
Each pest
rating represents the view of CDFA of the statewide importance of the pest to
the agricultural, horticultural, forestry, and public health interests of
(iii)
It is the
policy of CDFA to use an Action-Oriented Rating System.�
Pest ratings represent the policy of CDFA in relation to actions to be
taken, consistent with existing statutes, which include authority for: the
promulgation of quarantine, eradication, control, standards of cleanliness, and
other regulations; holding and inspection; establishing host-free, weed-free,
and special pest control districts; and for other regulatory activities.
II
ACTION-ORIENTED
RATING SYSTEM
A
An organism of known economic importance subject to action enforced by
the state (or County Agricultural Commissioner acting as a state agent)
involving: eradication, quarantine
regulation, containment, rejection, or other holding action.
Q
An organism or disorder requiring a temporary A� action pending
determination of a permanent rating.
The organism is suspected to be of economic importance but its status is
uncertain because of incomplete identification or inadequate information.
In
the case of an established infestation, at the discretion of the Director, CDFA
may conduct surveys and may convene the Division Pest Study Team to determine a
permanent rating.
B
An organism of known economic importance that is of limited distribution
in the State of California and is subject to:
eradication, containment, control or other holding action at the
discretion of the individual County Agricultural Commissioner.
C
An organism already of common occurrence in the state that is subject to no state-enforced action outside of nurseries
except to retard spread. At the
discretion of the
D
No Action - plant parasites or other organisms of little or no economic
importance, or organisms considered beneficial..
https://www.cdfa.ca.gov/plant/pestratings/docs/3162-ApprovedText-final.pdf
Details of the Pest Rating System in California are provided at:
https://www.cdfa.ca.gov/plant/regs_pestrating.html
Nematode
(Alphabetically by
genus and species)
Genus/species |
Common Name |
Rating |
Anguina agrostis | Bent grass Seed-gall Nematode |
B |
Seed Gall Nematode |
A |
|
Pacific Shoot-gall Nematode |
C | |
Wheat Seed-gall Nematode |
A |
|
Strawberry Summer Dwarf Nematode Rice White-tip Nematode |
A |
|
Aphelenchoides fragariae | Strawberry Foliar Nematode |
C |
|
C |
|
Asian
Citrus Root-knot Nematodes Meloidogyne
citri M.
donghaiensis M.
jianyangensis M. kongi M.
mingnanica |
Asian Citrus Root-knot Nematodes Complex |
A |
Sting Nematode |
A |
|
Red Ring Nematode |
A |
|
Bursaphelenchus xylophilus | Pine Wood Nematode |
C |
Cactus Cyst Nematode |
A |
|
Criconemoides
spp.
|
Ring Nematodes |
C |
Potato Rot Nematode |
A |
|
Stem and Bulb Nematode |
C |
|
Dolichodorus heterocephalus | Cobb's Awl Nematode; Awl Nematode | A |
Pale or White Cyst Nematode |
A |
|
Golden Nematode |
A |
|
Spiral Nematode |
B |
|
Helicotylenchus spp. |
Spiral Nematodes |
C |
Sheathoid Nematode |
C |
|
Sheathoid Nematode |
C |
|
Sheath Nematode |
B |
|
Australian Cereal Cyst Nematode |
A |
|
European Cereal Cyst Nematode |
A |
|
Carrot Cyst Nematode |
B |
|
Heterodera ciceri | Chickpea Cyst Nematode | A |
Heterodera cruciferae | Cabbage Cyste Nematode |
C |
Fig Cyst Nematode |
C |
|
Filipjev's Cereal Cyst Nematode |
A |
|
Soybean Cyst Nematode |
A |
|
Rye grass Cyst Nematode |
B |
|
Heterodera schachtii | Sugarbeet Cyst Nematode |
C |
Sturhan Cereal Cyst Nematode |
A |
|
Ustinov Grass Cyst Nematode |
A |
|
|
C |
|
Hirschmanniella diversa |
|
C |
Hoplolaimus galeatus | Lance Nematode |
A |
Longidorus africanus | Needle Nematode |
C |
Needle Nematode |
B |
|
Longidorus orientalis | Needle Nematode |
C |
Peanut Root-knot Nematode |
C |
|
British Root-knot Nematode |
A |
|
Columbia Root-knot Nematode |
B |
|
Root-knot Nematode |
A |
|
Root-knot Nematode |
A |
|
Northern Root-knot Nematode |
C |
|
Sevillle Root-knot Nematode |
A |
|
Southern Root-knot Nematode |
C |
|
Root-knot Nematode |
C |
|
Meloidogyne minor |
Root-knot Nematode |
A |
Meloidogyne naasi | Barley Root-knot Nematode |
B |
Meloidoyne paranaensis | Parana Coffee Root-knot Nematode |
A |
Merlinius spp. |
Stunt Nematodes |
C |
Ring Nematode |
C |
|
Stubby Root Nematode |
C |
|
Paratrichodorus porosus |
Stubby Root Nematode |
C |
Paratrichodorus spp. |
Stubby Root Nematode |
C |
Paratylenchus spp. |
Pin Nematode |
C |
Allens Root Lesion Nematode |
A |
|
Pratylenchus brachyurus | Smooth-headed Lesion Nematode |
C |
Root Lesion Nematode |
B |
|
Pratylenchus crenatus |
Root Lesion Nematode |
B |
Amaryllis Lesion Nematode |
B |
|
Root Lesion Nematode |
C |
|
Pratylenchus penetrans |
Root Lesion Nematode |
C |
Pratylenchus scribneri |
Root Lesion Nematode |
C |
Root Lesion Nematode |
C |
|
Pratylenchus zeae |
Root Lesion Nematode |
C |
Grass Cyst Nematode |
C |
|
Quinisulcius spp. |
Stunt Nematodes |
C |
Burrowing Nematode |
A |
|
Reniform Nematode |
A |
|
Scutellonema spp. |
Spiral Nematode |
C |
Tylenchorhynchus spp. |
Stunt Nematodes |
C |
Tylenchulus semipenetrans |
Citrus Nematodes |
C |
American Dagger Nematode |
C |
|
Xiphinema bakeri |
Baker's Dagger Nematode |
C |
Xiphinema basiri |
Dagger Nematode |
A |
Xiphinema chambersi |
Chamber's Dagger Nematode |
B |
European Dagger Nematode |
A |
|
California Dagger Nematode |
B |
|
Dagger Nematode |
A |
|
Nematode
(sorted by rating)
Genus/species |
Common Name |
Rating |
Seed Gall Nematode |
A |
|
Wheat Seed-gall Nematode |
A |
|
Strawberry Summer Dwarf Nematode
Rice White-tip Nematode |
A |
|
Asian Citrus Root-knot
Nematodes Meloidogyne citri M. donghaiensis M. jianyangensis M. kongi M. mingnanica |
Asian Citrus Root-knot Nematodes Complex |
A |
Sting Nematode |
A |
|
Red Ring Nematode |
A |
|
Cactus Cyst Nematode |
A |
|
Potato Rot Nematode |
A |
|
Cobb's Awl Nematode; Awl Nematode |
A |
|
Pale or White Cyst Nematode |
A |
|
Golden Nematode |
A |
|
Australian Cereal Cyst Nematode |
A |
|
European Cereal Cyst Nematode |
A |
|
Chickpea Cyst Nematode |
A |
|
Filipjev's Cereal Cyst Nematode |
A |
|
Soybean Cyst Nematode |
A |
|
Sturhan Cereal Cyst Nematode |
A |
|
Ustinov Grass Cyst Nematode |
A |
|
Lance Nematode |
A |
|
British Root-knot Nematode |
A |
|
Root-knot Nematode |
A |
|
Root-knot Nematode |
A |
|
Sevillle Root-knot Nematode |
A |
|
Root-knot Nematode |
|
|
Parana Coffee Root-knot Nematode |
|
|
Allens Root Lesion Nematode |
A |
|
Burrowing Nematode |
A |
|
Reniform Nematode |
A |
|
Dagger Nematode |
A |
|
European Dagger Nematode |
A |
|
Dagger Nematode |
A |
|
Bent grass Seed-gall Nematode |
B |
|
Spiral Nematode |
B |
|
Sheath Nematode |
B |
|
Carrot Cyst Nematode |
B |
|
Rye grass Cyst Nematode |
B |
|
Needle Nematode |
B |
|
Columbia Root-knot Nematode |
B |
|
Barley Root-knot Nematode |
|
|
Root Lesion Nematode |
B |
|
Root Lesion Nematode |
B |
|
Amaryllis Lesion Nematode |
B |
|
Chamber's Dagger Nematode |
B |
|
California Dagger Nematode |
B |
|
Pacific Shoot-gall Nematode |
C |
|
Strawberry Foliar Nematode |
C |
|
Crysanthemum Foliar Nematode |
C |
|
Pine Wood Nematode |
C |
|
Criconemoides
spp.
Mesocriconema
spp. |
Ring Nematodes |
C |
Stem and Bulb Nematode |
C |
|
Helicotylenchus
spp. |
Spiral Nematodes |
C |
Sheathoid Nematode |
C |
|
Sheathoid Nematode |
C |
|
Cabbage Cyste Nematode |
|
|
Fig Cyst Nematode |
C |
|
Sugarbeet Cyst Nematode |
|
|
|
C |
|
Hirschmanniella diversa |
|
C |
Needle Nematode |
C |
|
Needle Nematode |
|
|
Northern Root-knot Nematode |
C |
|
Southern Root-knot Nematode |
C |
|
Root-knot Nematode |
C |
|
Peanut Root-knot Nematode |
C |
|
Merlinius
spp. |
Stunt Nematodes |
C |
Ring Nematode |
C |
|
Stubby Root Nematode |
C |
|
Paratrichodorus porosus |
Stubby Root Nematode |
C |
Paratrichodorus spp. |
Stubby Root Nematode |
C |
Paratylenchus
spp. |
Pin Nematode |
C |
Smooth-headed Lesion Nematode |
|
|
Root Lesion Nematode |
C |
|
Root Lesion Nematode; Cobb's Lesion Nematode |
C |
|
Root Lesion Nematode; Scribner's Lesion Nematode |
C |
|
Root Lesion Nematode |
C |
|
Root Lesion Nematode; Corn Lesion Nematode |
C |
|
Grass Cyst Nematode |
C |
|
Quinisulcius spp. |
Stunt Nematodes |
C |
Scutellonema spp. |
Spiral Nematode |
C |
Tylenchorhynchus spp. |
Stunt Nematodes |
C |
Citrus Nematodes |
C |
|
American Dagger Nematode |
C |
|
Baker's Dagger Nematode |
C |
Nematode
(sorted by rating)
Genus/species |
Common Name |
Rating |
strawberry summer dwarf nematode |
A |
|
Belonolaimus
spp. |
sting nematode |
A |
sting nematode |
A |
|
Cobb's awl nematode |
A |
|
white cyst potato nematode |
A |
|
golden nematode |
A |
|
sheath nematode |
A |
|
oat cyst nematode |
A |
|
soybean cyst nematode |
A |
|
rice root nematode |
A |
|
sugarbeet false root-knot nematode |
A |
|
burrowing nematode |
A |
|
reniform nematode |
A |
|
European dagger nematode |
A |
|
|
|
|
potato rot nematode |
B |
|
|
B |
|
barley root-knot nematode |
B |
|
|
B |
|
|
|
|
bent grass nematode |
C |
|
wheat nematode |
C |
|
strawberry spring dwarf nematode |
C |
|
chrysanthemum foliar nematode |
C |
|
pine wood nematode |
C |
|
Ditylenchus dipsaci |
stem and bulb nematode |
C |
cabbage cyst nematode |
C |
|
Heterodera schachtii |
sugarbeet cyst nematode |
C |
no common name known |
C |
|
root-knot nematode |
C |
|
Meloidogyne
spp. |
root-knot nematode |
C |
Paralongidorus microlaimus |
needle nematode |
C |
smooth-headed lesion
nematode |
C |
|
coffee lesion nematode |
C |
|
Cobb's lesion nematode |
C |
|
walnut lesion nematode |
C |
|
corn lesion nematode |
C |
|
no common name known |
C |
|
citrus nematode |
C |
|
American dagger nematode |
C |
|
dagger nematode |
C |
|
dagger nematode |
C |
|
Xiphinema coxi |
dagger nematode |
C |
Xiphinema insigne |
dagger nematode |
C |
dagger nematode |
C |
|
|
|
|
seed gall nematode |
D |
|
seed gall nematode |
D |
|
a
fungus-feeding nematode |
D |
|
no common name known |
D |
|
no common name known |
D |
|
Bakernema variabile |
spine nematode |
D |
Cacopaurus spp. |
sessile nematode |
D |
cactus cyst nematode |
D |
|
Criconema sp. |
spine nematode |
D |
Criconemella axeste |
ring nematode |
D |
Criconemella curvata |
ring nematode |
D |
Criconemella macrodora |
ring nematode |
D |
Criconemella parva |
ring nematode |
D |
ring nematode |
D |
|
Criconemoides
spp. |
ring nematode |
D |
Crossonema fimbriatum |
spine nematode |
D |
a bulb and stem nematode |
D |
|
Dolichodorus spp. |
awl nematode |
D |
Gracilacus spp. |
pin nematode |
D |
Helicotylenchus
spp. |
spiral nematode |
D |
Helicotylenchus spicaudatus |
spiral nematode |
D |
Hemicriconemoides
spp. |
sheathoid nematode |
D |
Hemicycliophora megalodiscus |
sheath nematode |
D |
Hemicycliophora spp. |
sheath nematode |
D |
Heterodera fici |
fig cyst nematode |
D |
Heterodera trifolii |
clover cyst nematode |
D |
rice root nematode |
D |
|
Hirschmanniella caudacrena |
rice root nematode |
D |
Hirschmanniella gracilis |
rice root nematode |
D |
Hoplolaimus
spp. |
lance nematode |
D |
Longidorus
spp. |
needle nematode |
D |
Merlinius brevidens |
stunt nematode |
D |
Merlinius conicus |
stunt nematode |
D |
Merlinius grandis |
stunt nematode |
D |
Merlinius superbus |
stunt nematode |
D |
Nacobbus dorsalis |
false root-knot nematode |
D |
Pararotylenchus
sp. |
spiral nematode |
D |
Paratrichodorus allius |
stubby- root nematode |
D |
Paratrichodorus minor |
Christie's stubby- root |
D |
Paratrichodorus porosus |
stubby- root nematode |
D |
Paratrichodorus renifer |
stubby- root nematode |
D |
Paratylenchus
spp. |
pin nematode |
D |
Pratylenchus convallariae |
lesion nematode |
D |
lesion nematode |
D |
|
lesion nematode |
D |
|
Pratylenchus hexincisus |
lesion nematode |
D |
lesion nematode |
D |
|
lesion nematode |
D |
|
lesion nematode |
D |
|
lesion nematode |
D |
|
lesion nematode |
D |
|
Quinisulcius acutus |
stunt nematode |
D |
Quinisulcius capitatus |
stunt nematode |
D |
Rotylenchus
spp. |
spiral nematode |
D |
Sarisodera hydrophylla |
no common name known |
D |
Scutellonema
spp. |
spiral nematode |
D |
Trichodorus
spp. |
stubby-root nematode |
D |
Tylenchorhynchus
spp. |
stunt nematode |
D |
|
|
|
pine wood nematode |
Q |
|
lesion nematode |
Q |
|
dagger nematode |
Q |
|
dagger nematode |
Q |
|
dagger nematode |
Q |