IPM, CDFA IPM License Exam
Which one is a poisonous weed? halogeton, alkali mallow, filaree – answer halogeton,
A rated noxious weed
What family is the alligator weed family in? – answer Amaranthaceae
Skeleton weed (chondrilla juncea) seeds are spread by: birds, wind, domestic animals -
answer wind
Winter annuals spend winter in...____ - answervegetative rosettes
Camelthorn is a ____ - answer perennial, A rated
Most widely spread weed in California? - answer Yellow Star Thistle, C-rated
Why doesn't alfalfa have many weed problems? - answer tall top growth and thick root
mat characteristics
Definition of A rated weed: - answerEradication, containment, rejection, state-county
level.
Definition of B rated weed - answerContainment at discretion of commissioner
Which weed is considered a nuisance? - answercamelthorn
The color of the flower of skeleton weed is: yellow, white, green, red - answeryellow
The color of the flower for alligator weed is: - answerwhite
Broomrape is a pest of: field crops, tomatoes, orchards - answertomatoes
Which weed is most poisonous to livestock: CA milkweed, desert milkweed, purple
milkweed, woolypod milkweed - answerwoolypod milkweed
Mediterranean sage is: annual, perennial, biennial - answerbiennial
This weed can get 9' tall and 5' wide: scotch thistle, alligator weed, field cress,
dalmatian toadflax - answeralligator weed
Successful weed control: ducks, geese, goats, manaetees - answergoats
,Which is NOT a biocontrol of klamath weed: chrysolina, inch worm, a midge -
answermidge
Dodder is a pest of _________ - answertomatoes
Bio control of musk thistle eats what part of the plant: seed head, stems, leaves -
answerseed head
What controls tansy ragwort? - answerCinnabar Moth
Rate the following: Scotch Thistle, Dalmatian Toadflax, Alligator Weed, Austrian field
cress - answerA, A, A, B
Red scale on citrus: what part of plant: leaves and fruit, stems, branches, all -
answerALL. red scale attacks all aerial parts of the tree including twigs, leaves,
branches and fruit by sucking on plant tissue with their long, filamentous mouthpart
Potato Late Blight to prevent? - answeris controlled by eliminating cull piles and
volunteer potatoes, using proper harvesting and storage practices, and applying
fungicides when necessary. Air drainage to facilitate the drying of foliage each day is
important
Walnut Blight: what do? prune, spray, etc. - answerAll green tissue is sensitive to walnut
blight infections. Economic damage occurs when the developing nut is infected. The
bacterium that causes walnut blight overwinters primarily in dormant buds. Rain is
important for spreading bacteria and aiding infection. Early leafing varieties are most
severely affected, and the disease tends to be more severe in northern California.
Management of this disease depends on the application of protective sprays to buds,
flowers, and developing nuts. In orchards with histories of walnut blight damage,
protective treatments at 7- to 10-day intervals during prolonged wet springs are
necessary for adequate disease control. In areas or years with less intensive rainfall,
spray intervals can be stretched, and weather forecasts can help with spray timing.
Shot Hole Fungus overwinters in: sclerotia in soil, in buds and stems, etc -
answerSurvives on infected twigs and buds. Spores are produced throughout winter
and are spread by splashing rain and wind. The disease is favored by prolonged
wetness in fall to mid-winter (twig blight). Summer rain or sprinkler irrigation encourages
fruit infection. There is more infection low in the tree where fruit stay wet longer.
Shot hole is managed primarily with fungicide treatments to protect buds and twigs from
infection. In orchards where twig infections are prevalent, the efficacy of the dormant
treatment can be improved by pruning out and destroying infected wood. If the orchard
is sprinkler irrigated, be sure to angle sprinkler heads low enough to keep from wetting
the canopy
,Grape leaf skeletonizer - answerA granulosis virus, endemic in southern California, has
been introduced in selected areas with excellent success. It is extremely infectious
when it is introduced into an outbreak population of western grapeleaf skeletonizer.
Symptoms of populations infected with the virus include: (1) eggs within clusters are
scattered instead of compactly laid, and the number of eggs is reduced; (2) most eggs
fail to hatch; (3) larvae consume tiny patches of tissue rather than consuming entire
areas of the leaf; (4) diseased larvae are sluggish and feed solitarily instead of in tight
groups and usually tend to wander irregularly, leaving a visible trail of liquid excrement;
and (5) larval growth and coloration change, and larvae shrink and eventually die. This
virus is transmitted from one generation to the next by disease-carrying adults that
survive a low degree of infection in the larval stage.
Verticillium Wilt - answerVerticillium survives in the soil as microsclerotia in the soil that
germinate in the vicinity of roots. Disease severity depends on the number of root
penetrations. Verticillium wilt is favored by cool air and soil temperatures.
Botrytis - answerThe fungus overwinters as sclerotia in berry mummies on the ground
or left hanging on the vine and in canes. Germination and spore production occur in
spring. Infections require free water for a definite period of time depending on
temperature. Infections may occur during bloom should rains occur; preclose rachis
infections often occur on Chardonnay. Late-season infections are most severe when
relative humidity exceeds 92%, free moisture is present on the fruit surface, and
temperatures are in the 58° to 82°F range. Berries that have been damaged by insects,
birds, machinery, etc. may become infected at any time after the fruit begins to ripen
because the juice in the berry can provide the necessary water and nutrients for fungal
growth.
Successful management of Botrytis bunch rot can be achieved through the use of
several strategies. The efficacy of a fungicide depends on getting good coverage, and
coverage is affected by the canopy and stage of growth. By employing cultural control
methods, properly applying fungicides, and using resistant varieties, the disease can be
managed.
During cool, wet springs, ash trees and another tree are susceptible to: heart rot,
anthracnose - answerAnthracnose
Aster yellows is a: mycoplasma, virus, fungus, phytoplasm - answerphytoplasma, no
longer called mycoplasma
Halo Blight Bacteria and Beans - answerHalo blight disease occurs worldwide and can
cause extensive losses under favorable conditions, which are moderate temperatures
(60° to 73°F, 16° to 23°C) and humid moist conditions. Fortunately, such conditions are
unusual in California and thus halo blight is uncommon on beans grown in California.
Halo blight bacteria can over winter in infested debris or in association with seed;
infested seed is the most important inoculum source.
, What is the natural enemy/predator/parasite of the walnut aphid - answerTrioxys
pallidus; a parasitic wasp.
How are ants a problem to agriculture - answerDamage equipment, slow down
operators, fieldworker medical problems, equipment failures
Citrus bud mite leads to _____ - answerdistorted fruit
Which is not a Pierce's Disease vector?: Green peach aphid, red headed sharp shooter,
grape leafhopper - answergrape leafhopper
The alfalfa butterfly parasite attack: early instars, later instars, eggs - answerearly
instars
Katydids lay eggs where? - answerlays eggs in two overlapping rows under leaves or in
between leaves and on tip of twigs
Pea aphids attack: lettuce, alfalfa, cotton - answeralfalfa
Vineyard is expanded to riverbank. How is Pierce's disease prevented? Tolerant
rootstock, spray with pesticides, plant a row of willow trees - answerTolerant rootstock
20. How is Tristeza on citrus avoided? - answerTristeza free material
What conditions would you have mites? - answerDry and dusty conditions
Vedalia beetles are used to control_____ - answercottony cushion scale.
Urea is sprayed on apples b/c... - answerit speeds up leaf decay which lessen fungal
innoculum
How is powdery mildew treated in vineyards? - answerSpray with lime sulfur, overhead
watering.
How is pink bollworm in San Joaquin treated - answerSterile males
Treatment of armillaria root rot is... - answerfumigation with methyl bromide
What aphid causes damage to cotton - answerCotton aphid, Aphis gossypii
What color are immature pirate bugs? Yellow, like adult, black, orange - answeryellow
or reddish brown
Nematodes are found on alfalfa. What do you do? - answerTake more samples, look for
nematode symptoms, don't remember other answers
Which one is a poisonous weed? halogeton, alkali mallow, filaree – answer halogeton,
A rated noxious weed
What family is the alligator weed family in? – answer Amaranthaceae
Skeleton weed (chondrilla juncea) seeds are spread by: birds, wind, domestic animals -
answer wind
Winter annuals spend winter in...____ - answervegetative rosettes
Camelthorn is a ____ - answer perennial, A rated
Most widely spread weed in California? - answer Yellow Star Thistle, C-rated
Why doesn't alfalfa have many weed problems? - answer tall top growth and thick root
mat characteristics
Definition of A rated weed: - answerEradication, containment, rejection, state-county
level.
Definition of B rated weed - answerContainment at discretion of commissioner
Which weed is considered a nuisance? - answercamelthorn
The color of the flower of skeleton weed is: yellow, white, green, red - answeryellow
The color of the flower for alligator weed is: - answerwhite
Broomrape is a pest of: field crops, tomatoes, orchards - answertomatoes
Which weed is most poisonous to livestock: CA milkweed, desert milkweed, purple
milkweed, woolypod milkweed - answerwoolypod milkweed
Mediterranean sage is: annual, perennial, biennial - answerbiennial
This weed can get 9' tall and 5' wide: scotch thistle, alligator weed, field cress,
dalmatian toadflax - answeralligator weed
Successful weed control: ducks, geese, goats, manaetees - answergoats
,Which is NOT a biocontrol of klamath weed: chrysolina, inch worm, a midge -
answermidge
Dodder is a pest of _________ - answertomatoes
Bio control of musk thistle eats what part of the plant: seed head, stems, leaves -
answerseed head
What controls tansy ragwort? - answerCinnabar Moth
Rate the following: Scotch Thistle, Dalmatian Toadflax, Alligator Weed, Austrian field
cress - answerA, A, A, B
Red scale on citrus: what part of plant: leaves and fruit, stems, branches, all -
answerALL. red scale attacks all aerial parts of the tree including twigs, leaves,
branches and fruit by sucking on plant tissue with their long, filamentous mouthpart
Potato Late Blight to prevent? - answeris controlled by eliminating cull piles and
volunteer potatoes, using proper harvesting and storage practices, and applying
fungicides when necessary. Air drainage to facilitate the drying of foliage each day is
important
Walnut Blight: what do? prune, spray, etc. - answerAll green tissue is sensitive to walnut
blight infections. Economic damage occurs when the developing nut is infected. The
bacterium that causes walnut blight overwinters primarily in dormant buds. Rain is
important for spreading bacteria and aiding infection. Early leafing varieties are most
severely affected, and the disease tends to be more severe in northern California.
Management of this disease depends on the application of protective sprays to buds,
flowers, and developing nuts. In orchards with histories of walnut blight damage,
protective treatments at 7- to 10-day intervals during prolonged wet springs are
necessary for adequate disease control. In areas or years with less intensive rainfall,
spray intervals can be stretched, and weather forecasts can help with spray timing.
Shot Hole Fungus overwinters in: sclerotia in soil, in buds and stems, etc -
answerSurvives on infected twigs and buds. Spores are produced throughout winter
and are spread by splashing rain and wind. The disease is favored by prolonged
wetness in fall to mid-winter (twig blight). Summer rain or sprinkler irrigation encourages
fruit infection. There is more infection low in the tree where fruit stay wet longer.
Shot hole is managed primarily with fungicide treatments to protect buds and twigs from
infection. In orchards where twig infections are prevalent, the efficacy of the dormant
treatment can be improved by pruning out and destroying infected wood. If the orchard
is sprinkler irrigated, be sure to angle sprinkler heads low enough to keep from wetting
the canopy
,Grape leaf skeletonizer - answerA granulosis virus, endemic in southern California, has
been introduced in selected areas with excellent success. It is extremely infectious
when it is introduced into an outbreak population of western grapeleaf skeletonizer.
Symptoms of populations infected with the virus include: (1) eggs within clusters are
scattered instead of compactly laid, and the number of eggs is reduced; (2) most eggs
fail to hatch; (3) larvae consume tiny patches of tissue rather than consuming entire
areas of the leaf; (4) diseased larvae are sluggish and feed solitarily instead of in tight
groups and usually tend to wander irregularly, leaving a visible trail of liquid excrement;
and (5) larval growth and coloration change, and larvae shrink and eventually die. This
virus is transmitted from one generation to the next by disease-carrying adults that
survive a low degree of infection in the larval stage.
Verticillium Wilt - answerVerticillium survives in the soil as microsclerotia in the soil that
germinate in the vicinity of roots. Disease severity depends on the number of root
penetrations. Verticillium wilt is favored by cool air and soil temperatures.
Botrytis - answerThe fungus overwinters as sclerotia in berry mummies on the ground
or left hanging on the vine and in canes. Germination and spore production occur in
spring. Infections require free water for a definite period of time depending on
temperature. Infections may occur during bloom should rains occur; preclose rachis
infections often occur on Chardonnay. Late-season infections are most severe when
relative humidity exceeds 92%, free moisture is present on the fruit surface, and
temperatures are in the 58° to 82°F range. Berries that have been damaged by insects,
birds, machinery, etc. may become infected at any time after the fruit begins to ripen
because the juice in the berry can provide the necessary water and nutrients for fungal
growth.
Successful management of Botrytis bunch rot can be achieved through the use of
several strategies. The efficacy of a fungicide depends on getting good coverage, and
coverage is affected by the canopy and stage of growth. By employing cultural control
methods, properly applying fungicides, and using resistant varieties, the disease can be
managed.
During cool, wet springs, ash trees and another tree are susceptible to: heart rot,
anthracnose - answerAnthracnose
Aster yellows is a: mycoplasma, virus, fungus, phytoplasm - answerphytoplasma, no
longer called mycoplasma
Halo Blight Bacteria and Beans - answerHalo blight disease occurs worldwide and can
cause extensive losses under favorable conditions, which are moderate temperatures
(60° to 73°F, 16° to 23°C) and humid moist conditions. Fortunately, such conditions are
unusual in California and thus halo blight is uncommon on beans grown in California.
Halo blight bacteria can over winter in infested debris or in association with seed;
infested seed is the most important inoculum source.
, What is the natural enemy/predator/parasite of the walnut aphid - answerTrioxys
pallidus; a parasitic wasp.
How are ants a problem to agriculture - answerDamage equipment, slow down
operators, fieldworker medical problems, equipment failures
Citrus bud mite leads to _____ - answerdistorted fruit
Which is not a Pierce's Disease vector?: Green peach aphid, red headed sharp shooter,
grape leafhopper - answergrape leafhopper
The alfalfa butterfly parasite attack: early instars, later instars, eggs - answerearly
instars
Katydids lay eggs where? - answerlays eggs in two overlapping rows under leaves or in
between leaves and on tip of twigs
Pea aphids attack: lettuce, alfalfa, cotton - answeralfalfa
Vineyard is expanded to riverbank. How is Pierce's disease prevented? Tolerant
rootstock, spray with pesticides, plant a row of willow trees - answerTolerant rootstock
20. How is Tristeza on citrus avoided? - answerTristeza free material
What conditions would you have mites? - answerDry and dusty conditions
Vedalia beetles are used to control_____ - answercottony cushion scale.
Urea is sprayed on apples b/c... - answerit speeds up leaf decay which lessen fungal
innoculum
How is powdery mildew treated in vineyards? - answerSpray with lime sulfur, overhead
watering.
How is pink bollworm in San Joaquin treated - answerSterile males
Treatment of armillaria root rot is... - answerfumigation with methyl bromide
What aphid causes damage to cotton - answerCotton aphid, Aphis gossypii
What color are immature pirate bugs? Yellow, like adult, black, orange - answeryellow
or reddish brown
Nematodes are found on alfalfa. What do you do? - answerTake more samples, look for
nematode symptoms, don't remember other answers
