Chapter 1

Question 0

what disease of plants causes these symptoms? -leaf spots, lesions, rots, and stains.

Answer 0

rice blast

Question 1

what fungi causes late blight diseasi in plants?

Answer 1

phytophthora infestans

Question 2

what fungi causes the dutch elm disease?

Answer 2

ophiostoma ulmi

Question 3

what fungi causes the rust disease?

Answer 3

puccinia monoica

Question 4

it is the grape disease.

Answer 4

powdery mildew

Question 5

potato disease.

Answer 5

late blight

Question 6

fungi that causes rice blast.

Answer 6

magnaporthe oryzae

Question 7

fungi that causes coffee rust.

Answer 7

hemileia vastatrix

Question 8

devastated the coffee plantation in sri lanka.

Answer 8

coffee rust

Question 9

leaves are covered with spermagonia which produces a fluid that attracts pollinators

Answer 9

rust

Question 10

bacteria that causes fire blight

Answer 10

erwinia amylovora

Question 11

disease that turns leaves slimy

Answer 11

soft rot

Question 12

bacteria that causes soft rot

Answer 12

pseudomonas aeruginosa

Question 13

bacteria that causes gall disease

Answer 13

agrobacterium tumifaciens

Question 14

asian orange disease with corky outgrowths

Answer 14

citrus canker

Question 15

what causes citrus canker?

Answer 15

xantomonas citri

Question 16

brought by calico virus which is transmitted by insects?

Answer 16

peach yellow

Question 17

stunting
mosaic pattern of light and dark green (or yellow and green) on the leaves
malformation of leaves or growing points
yellow streaking of leaves (especially monocots)
yellow spotting on leaves
distinct yellowing only of veins

Answer 17

tobacco mosaic

Question 18

disease of a wide range of dicotyledonous plants

including the rose family such as pears, apples, cherry, rose

Answer 18

crown gall disease or gall disease

Question 19

disease that causes the plants leaves to curl around the midrib and may assume a leathery texture

Answer 19

potato leaf roll

Question 20

it occurs in diff kinds of plants including tomato pepper cucurbits spinach and beets

Answer 20

curly top of beet

Question 21

what virus causes the curly top of beet?

Answer 21

curto viruses

Question 22

large galls or knots can form throughout the infected plants root system

Answer 22

root knot

Question 23

causes root knot

Answer 23

meloidogyne species (nematode)

Question 24

it is a morphological root that forms morphological and physiological link between the parasite and host

Answer 24

haustorium

Question 25

angiosperm that directly attaches to another plant via the haustorium

Answer 25

parasitic plant

Question 26

parasitic plant without a body or leaves. its main body resides inside the host plant. its only visible part is its flower which bursts through the host plants bark as compact buds.

Answer 26

rafflesia arnoldii

Question 27

the well known mistle toe ,____ ,that grows on branches of trees where it forms pendent bushes

Answer 27

evergreen parasitic plant

Question 28

scientific name of theeuropean mistletoe

Answer 28

viscum album

Question 29

give the five adverse environmental conditions

Answer 29

High/Low temperature
Soil Moisture Disturbances
Atmosphere impurities
Lightning
Nutritional disorders