PCA - Plant Pathogens Updated and Graded 100%

PCA - Plant Pathogens Updated and Graded 100% most soil born diseases are - Answer : single cycled diseases serious epidemics are more likely to occur from a multiple cycled disease rather than a single cycled disease because - Answer : multiple cycled diseases produce secondary inoculum that can cause secondary infections sanitation practices are often a more effective management tool for single cycled diseases then multi cycled diseases because - Answer : in a single cycled disease the primary incoculum is the only inocuclum available for the entire season a race of a pathogen refers to - Answer : a group of pathogens within a species that infects only certain varieties of a host plant the time between host penetration and the first appearance of symptoms is called the - Answer : incubation period a mushroom is an example of a - Answer : basidocarp most fungal disease that attack flowers are favored by - Answer : wet weather fungi penetration the host plant by directly penetration of - Answer : open wounds obligate fungal parasites - Answer : are unable to feed on dead cells at times it is difficult to determine the casual agent of a disease because various agents result in similare symptoms. which of the following symptoms are similare - Answer : wilts (verticillium and fusarium) bacterial plant pathogens are - Answer : prokaryotes bacterial canker in tomatoes is commonly spread by all of the following execpt? - Answer : leaf hoppers environmental conditions that commonly favor the development of bacterial blights are - Answer : warm and humid conditions plant pathenogenic phytoplasims in bacteria are - Answer : prokaryotes which of the following is a typical symptom caused by black rot of crucifers - Answer : large V shaped chlorotic blotches cause of crown gull of fruit trees in many ornamentals, is in what genus - Answer : agrobacterium the bacterium responsible for crown gall over winters in all the following except - Answer : insect vectors