File:The Hawaiian forester and agriculturist (1906) (14595096907).jpg

Identifier: hawaiianforester34hawa (find matches)
Title: The Hawaiian forester and agriculturist
Year: 1904 (1900s)
Authors: Hawaii. Board of Commissioners of Agriculture and Forestry
Subjects: Agriculture -- Hawaii Periodials Forests and forestry -- Hawaii
Publisher: Honolulu : Hawaiian Gazette Co.
Contributing Library: The LuEsther T Mertz Library, the New York Botanical Garden
Digitizing Sponsor: The LuEsther T Mertz Library, the New York Botanical Garden

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macrospore of Tliiclaziopsis is somewhat below these dimen-sions. At any rate, tlie spores are mgested by various com-mon species of flies belonging to the Muscidae, Sarcophagidaeand Syrphidae. All the species 1 have tried are such as nor-mally search out and prefer saccharine food. These take inthe Thielaviopsis spores with sugar solutions artificiallv pre-pared as described, and the spores pass through the insectswith little if any apparent alteration. From one to a dozenor more spores are to be found in each portion of excrement 134
Text Appearing After Image:
Fig 6 Diseased pineapple about one-third natural size, a a, angle at the baseof the fruit where the disease found an entrance owing to the presence of insectwounds- the dark portion shows the nature of the advance of the rot upwardThrough the fruit. The dark color is due to the formation of the black macrosporesof the rot-fungus, the mycelium of the fungus being really considerably in advanceof the dark coloration; b, apex of the visibly rotten part It will be noted that thefungus advances most rapidly along the fibrous part of the fruit. 135 passed. Some of these spores are broken, but no greater pro-portion than before ingestion. The breakage is due to thetreatment with the sieve. Even the microspores appear inthe excrement apparently unaltered. In the same mannerthe aerial conidia of this fungus collected in water slightlysweetened may be fed to flies with the result that they passthrough the alimentary canal unaltered. All these spores germinate readily after passing through theca

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