$100 This soil-borne wilt pathogen has a very wide host range.

VERTICILLIUM

$200 One of the crops in which fusarium wilt is called yellows.

CELERY, CABBAGE

$300 The type of resting structures formed in host tissue by the wilt fusaria.

CHLAMYDOSPORES

$400 Term for the internal cell water pressure whose loss results in the wilt symptom.

TURGOR

$500 One of two wilts whose severity can be predicted by the mid winter average temperatures.

STEWARTS WILT, CUCUMBER WILT

$100 Two of the several genera of fungi which cause more or less round discrete spots on leaves - usually with a pale center dark or purple margin.

ASCOCHYTA, SEPTORIA, CERCOSPORA, PHYLLOSTICTA

$200 Way in which genera of powdery mildews can be distinguished.

APPENDAGES ON CLEISTOTHECIA

$300 One of two types of fungus fruiting bodies often seen as small specks in summer leaf spots.

PYCNIDIA, ACERVULI

$400 Term for a yellow zone surrounding a leaf spot.

CHLOROTIC HALO

$500 Yellow bacterium causing leaf blights of geranium, beans and other crops.

XANTHOMONAS

$100 Type of insect vectoring MLOs.

LEAFHOPPER

$200 Two of the groups of insects known to vector viruses.

APHIDS, WHITEFLIES, THRIPS, LEAFHOPPERS, BEETLES

$300 Two vectors of "soil-borne" viruses.

FUNGI, NEMATODES

$400 The main vector of viruses in commercial greenhouse crops.

MAN

$500 Insects which vector bacterial wilts.

BEETLES

$100 Disease which is one of the few caused by an actinomycete.

SCAB

$200 Leaf disease caused by a water mold that thinks it's a downy mildew.

LATE BLIGHT

$300 Two vascular wilts caused by soil-borne fungi.

VERTICILLIUM WILT, FUSARIUM WILT

$400 Pathogen causing stem rot and black scurf.

RHIZOCTONIA

$500 A systemic infection caused by a gram-positive bacterium.

RING ROT

$100 Color of pustules caused by Albugo.

WHITE (RUST)

$200 Name of fruit rot caused by Botrytis.

GRAY MOLD

$300 Most common fruit rot caused by Penicillium.

BLUE MOLD

$400 Color of carrot leaves on plants infected with aster yellows.

PURPLE

$500 Phytophthora rot of taproot of strawberry.

RED STELE

$100 Seed catalogs list more disease resistant varieties of this vegetable than any other.

TOMATO

$200 The letters VF and VFN after a vegetable variety name mean this.

RESISTANT TO VERTICILLIUM, FUSARARIUM WILTS and NEMATODES

$300 Three of the diseases for which seed potatoes are certified.

BLACK LEG, RING ROT, VERTICILLIUM, PVY, SPINDLE TUBER

$400 Non-chemical treatment used to eradicate pathogens from seed.

HOT WATER

$500 A seed-borne virus and a vegetable crop in which it is at a high level.

BCMV in SNAP BEANS, SqMV in MELON & SQUASH, TmRSV in TOMATO

Updated: July 7, 2001