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Pesticide > Category 3 > Flashcards

Category 3 Flashcards

1
Q

aphids

A

small, soft bodied insects that usually cluster on stems or undersides of terminal leaves

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2
Q

aphid damage

A

appears as leaf puckering, curling or twisting; honeydew

sucking mouthparts

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3
Q

scales

A

small soft bodied and circular/oval; legless and motionless most of life; crawlers are easiest stage to control

sucking mouthparts

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4
Q

scales damage

A

plants lack vigor, appear sickly and may have sooty mold growing on honeydew

sucking mouthparts

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5
Q

mealybugs

A

small softbodied mobile throughout their life and covered with a white and powdery like material

sucking mouthparts

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6
Q

whiteflies

A

small powerdy white and flutter like tiny moths when disturbed

sucking mouthparts

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7
Q

thrips

A

tiny slender insects that feed on flowers and leaves

sucking mouthparts

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8
Q

thrip damage

A

foilage may be streaked and silvered, flowers may be deformed and ahve white streaks

sucking mouthparts

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9
Q

mites

A

not insects; very small and have 8 legs

two spotted spider mite attacks wide range of plants

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10
Q

true bugs

A

suck sap from ornamental plants

lace bugs, plant bugs

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10
Q

leafmining flies

A

larvae of some small flies feed on inner tissue of leaves

chewing mouthpart

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10
Q

tent caterpillars

A

pests of trees which reside in silk webbing

chewing mouthpart

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10
Q

sawflies

A

larvae resemble caterpillars but have more than 5 pro legs

chewing mouthpart

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10
Q

beetles

A

adults front wings are hard and leathery and meet in a straight line down center of back

larvae often do most damage

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11
Q

weevils

A

beetles with mouthparts resembling snouts, attack many shrubs and trees

chewing mouthpart

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11
Q

bark beetles

A

can introduce fatal fungus to host conifer trees during egg laying

chewing mouthpart

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11
Q

caterpillars

A

larvae of moths and butterflies; mostly foilage feeders

chewing mouthpart

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12
Q

bagworms

A

live on trees in movable shelters made of silk and plant material

chewing mouthpart

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13
Q

white grubs

A

larvae of scarab beetles; most important turfgrass pest in Tennessee; feed on roots; treatments should be made from mid July to early August

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14
Q

billbugs

A

resemble small grubs with no thoracic legs

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15
Q

wire worms

A

larvae of click beetle

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16
Q

northern mole cricket

A

shovel like front legs; tunnel beneath soil

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17
Q

Cutworms

A

moth larvae; second most important pest in Tennessee

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18
Q

sod webworms

A

cut off grass blades and consume underground; baseball sized patches die; can be detected by pouring soapy water over 4 square feet of grass in closed frame

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19
Q

armyworms

A

larvae that feed in daytime; turf appears ragged; damage occurs in mid to late summer

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20
Q

chinch bugs

A

nymphs do most damage, feeding on tender portions of stems

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21
Q

leafhoppers

A

triangular shaped insects feed on leaves and stems

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22
Q

spittlebugs

A

nymphs live inside masses of spittle

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23
Q

leaf spots

A

definite spots of varying sizes; most common in early spring and fall

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24
Q

black spot

A

most serious disease of roses

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25
Q

apple scab

A

effects leavle treeses and fruit of apple trees

26
Q

anthracnose disease

A

can be common on sycamore and dogwood trees

27
Q

rust

A

produces spots called pustules which leave dusty rust color on fingers if touched

28
Q

cedar apple rust

A

causes galls on red cedar plants and leaf spots on apples

29
Q

powdery mildew

A

white or gray growth on leaves; cool nighttime temp and relative high humidity favor development

30
Q

leaf galls

A

appear on many woody ornamentals; apply fungicide at bud break

31
Q

root rot

A

occurs in areas of excess soil moisture

32
Q

stem rot

A

caused by soil inhabiting fungi; primarily effects herbaceous ornamentals

33
Q

black knot

A

common disease of ornamental fruit trees; knots should be removed and destroyed

34
Q

vascular wilt

A

caused by fungi invading water conducting vessels in trees; often one side of plant is first affected as it spreads to individual limbs; severely infected trees should be removed

35
Q

needlecasts

A

affect pines, causing spots or bands on needles

36
Q

crown gall

A

soft swelling of the roots or stems is first sign; gall becomes rough and releases more bacteria when decomposing

37
Q

bacterial leaf spot

A

irregularly shaped, shothole type symptom

38
Q

fire blight

A

infection occurs in spring; dark discolered leaves; diseased branches should be pruned out

39
Q

brown patch

A

up to 3 feet in diameter; smoke rings

40
Q

dollar spot

A

small straw colored patches 1 to 3 inches in diameter

41
Q

fairy ring

A

appear as large rings of very green grass; soil within ring may become dry or difficult to water

42
Q

Fusarium patch

A

develops in cold wet weather; often develops under trees leaves or snow

43
Q

Helminthosporium-type diseases

A

leaf spots appear small, purple to reddish brown; infection occurs in spring and fall but is worst during summer droughts

44
Q

powdery mildew

A

white to gray powdery growth of mycelium; leaves turn yellow and slowly die

45
Q

pythium

A

first appears as small spots 1 to 12 inches; diseased leaves are at first water soaked soft and slimy; cottony mycelium may appear

46
Q

red thread

A

patches of grass die rapidly during cool moist weather;leaves covered with red mycelium and red “threads”

47
Q

leaf rust

A

begins as small yellow flecks on leaves and stems that enlarge to pustules; found during cool wet weather in fall

48
Q

slime mold

A

fungal fruiting bodies of various colors; not a true pathogen of turf grass

49
Q

spring dead spot

A

first appear in 3 to 5 year old bermudagrass in the spring; spots appear in same place and expand for 3 or 4 years

50
Q

stripe smut

A

smut fungus makes leaves turn gray then black and split length wise

51
Q

white patch

A

appears as distinctly white patches 1 to 2 feet in diameter; small white mushrooms develop on leaf blades

52
Q

winter annuals

A

sprout in the fall and flower in the spring

53
Q

summer annuals

A

start from seed in spring or summer and dies in fall

54
Q

common chickweed

A

juicy-tissued, shallow-rooted winter annual; egg shaped leaves

55
Q

spurges

A

most are summer annuals; most have a milky acrid sap that irritates eyes mouth and skin

56
Q

henbit

A

winter annual; stems are 4 to 16 inches tall and square; flowers are pink to purple

57
Q

carolina geranium

A

stems are erect, hairy and pink to red; leaves are rounded, deeply divided into five to nine segments; light pink pale purple flowers

58
Q

knotweed

A

found in heavy traffic areas; stems form a dense mat from a small taproot

59
Q

dandelion

A

long thick fleshy taproot that contains milky juice; yellow flowers

60
Q

dock

A

broadleaf and curly are two types; broadleaf arises with single stem that may reach 4 feet with reddish purple leaves; curly is similar but taller and narrower leaves

61
Q

mousear chickweed

A

perennial with opposite and oblong leaves

62
Q

plantains

A

buckhorn and broadleaf; both reproduce by seed and new shoots at roots; buckhorn is leafless and bear a short dense flower stock; broadleaf has egg shaped leaves

63
Q

white clover

A

trifoliate leaves and stems that root at the nodes; rounded flower heads consist of 20 to 40 individual white flowers

64
Q

wild garlic

A

resembles cultivated onion and reproduces by underground bulbs

65
Q

wild violet

A

heart shaped leaves and purple flowers

66
Q

crabgrass

A

summer annual; three to 10 finger like branches form at the top of stems, each containing small flowers

67
Q

goosegrass

A

similar to crabgrass in appearance; smooth flat stems with distinctive silver or white centers

68
Q

bluegrass

A

winter annual; stems are flattened and grows in tufts

69
Q

bermudagrass

A

dense mats with spreading and branching stolons that root at the nodes; grows best in warm wet weather

70
Q

dallisgrass

A

coarse hairy leaves; produces seed talks up to several feet in height

71
Q

purple and yellow nutsedge

A

superficially resemble grass, yellow variant is more common in tennessee

Pesticide (3 decks)

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