Summary[edit] Description: Italiano: Frutto di limone infestato da Aspidiotus nerii, foto propria, ho scattato personalmente la fotografia. Date: 1 November 2008 (original upload date). Source: Transferred from it.wikipedia to Commons. Author: Michele.iannizzotto at Italian Wikipedia.
Red scale on orange tree Identifier: fumigationinvest79wogl (find matches)Title: Fumigation investigations in CaliforniaYear: 1909 (1900s)Authors: Woglum, R. S. (Russell Sage), 1882-Subjects: CitrusFumigationPublisher: Washington, D.C. : U.S. Dept. of Agriculture, Bureau of EntomologyContributing Library: U.S. Department of Agriculture, National Agricultural LibraryDigitizing Sponsor: U.S. Department of Agriculture, National Agricultural LibraryView Book Page: Book ViewerAbout This Book: Catalog EntryView All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:draw sap from thetree, even thoughthey are very mi-nute, the treesvitality is greatlyreduced. This ef-fect is very markedin the attack- ofthe red and purplescales. Both ofthese species causemuch destruction,yet the writer is ofthe opinion that thered scale will de-stroy a citrus treein less time thanwill the purple Fig. 6.—Orange tree almost destroyed by red scale. (Original.) qpqIp oil nthpr far- tors being equal. Trees have been noticed from two to three yearsafter planting which had been killed by the red scale. Largeorchard trees are frequently destroyed by the pest (fig. 6), while itis a very common sight in regions of severe infestation to see largebranches killed back to the trunk. Although no trees have evercome to the writers attention which were completely killed by thepurple scale, severe infestations result in the destruction of manybranches (fig. 7), and cause such a drain on the tree that the produc-tion of fruit is greatly decreased. Moreover, the purple scale spread-Text Appearing After Image:INJURY RESULTING TO SCALE (NFESTED TREES. 15 to the fruit, as docs also the red scale, resulting in expense for thecleaning of fruit in- rendering it of a lower grade and, in extremecases, entirely valueless. The black scale, although a much larger insect than either the redscale or purple scale, appears to have, generally, little effect on thevitality of the tree. Trees severely infested with the black scale mayappear as healthy as neighboring trees which are clean. Branchesare seldom if ever destroyed by its attacks alone. The commercial importance of the Mack scale arises largely fromits habit of secreting honeydew, which spreads over the leaves, fruit,Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Orange tree show; branches at center partly destroyed and stripped of leaves by purplescale (Lepidosaphes beckii). Identifier: fumigationinvest79wogl (find matches)Title: Fumigation investigations in CaliforniaYear: 1909 (1900s)Authors: Woglum, R. S. (Russell Sage), 1882-Subjects: CitrusFumigationPublisher: Washington, D.C. : U.S. Dept. of Agriculture, Bureau of EntomologyContributing Library: U.S. Department of Agriculture, National Agricultural LibraryDigitizing Sponsor: U.S. Department of Agriculture, National Agricultural LibraryView Book Page: Book ViewerAbout This Book: Catalog EntryView All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book.Text Appearing Before Image:INJURY RESULTING TO SCALE (NFESTED TREES. 15 to the fruit, as docs also the red scale, resulting in expense for thecleaning of fruit in- rendering it of a lower grade and, in extremecases, entirely valueless. The black scale, although a much larger insect than either the redscale or purple scale, appears to have, generally, little effect on thevitality of the tree. Trees severely infested with the black scale mayappear as healthy as neighboring trees which are clean. Branchesare seldom if ever destroyed by its attacks alone. The commercial importance of the Mack scale arises largely fromits habit of secreting honeydew, which spreads over the leaves, fruit,Text Appearing After Image:Fig. 7.—Orange tree show; branches at center partly destroyed and stripped of leaves by purplescale (Lepidosaphes beckii). (Original.) and branches, furnishing a growing medium for a black or sooty-moldfungus, resulting in a black coating throughout the tree. Thiscoating is removed from the fruit by washing, or in light attacks bybrushing. In the investigation by Mr. (1. Harold Powell0 of thecauses of decay of oranges while in transit from California, it wasshown that the decay was greater in washed than in unwashed fruit.To avoid the washing of fruit ii is necessary to destroy the scale inthe orchard-. a Bui. Ii1:;. Bur. Planl Industry, U. S. Dept. of Agriculture, L0O8. 16 FUMIGATION INVESTIGATIONS IN CALIFORNIA. The black scale confines its attack mainly to the branches, vet it iscommonly found on the leaves during its earlier stages of develop-ment and sometimes matures in this situation. Seldom does itmature on the fruit. The red and purple scales infest the branches,leaves, andNote About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
"Longitude (deg): -0.1. Latitude (deg): 50.8. Longitude (deg/min): 0ð 10' W. Latitude (deg/min): 50ð 50' N. Vice county name: East Sussex. Vice county no.: 14. Country: England. Stage: Imago. Associated species: Rosa. Identified by: Malcolm Storey. Comment: Scale insects on Rose. Category: microscope photograph. Image scaling: magnified. Photographic equipment used: ""35mm transparencies (on a variety of films, but Agfa CT18 in the 1960's to early 1980's followed by Fujichrome in the late 1980's.) Transparencies scanned with Minolta Dimage Scan Dual II AF-2820U transparency scanner."". "