123,879 research outputs found
Coffee berry disease in Kenya
No full textData are presented on research in Kenya in 1964 - 1969 on anatomical, mycological, epidemiological, chemical control and cultural aspects of coffee berry disease, Colletotrichum coffeanum Noack, of Coffea arabica L. The pathogen causes flower and berry losses and was found in branches where it occupied clearly defined areas of the cortex just before or after formation of the first phellogen. Saprophytic Colletotrichum spp. inhabit bark areas with more periderms in the cortex. No relationship could be found in Kenya between Glomerella cingulata (Stonem.) Sp. & Schr., the perfect stage of most of the saprophytic Colletotrichum bark components, and C. coffeanum . The seasonal fluctuations in pathogenicity in the bark population of C. coffeanum could be assessed and compared with the total sporulating capacity of the bark population of all Colletotrichum spp. Formerly the level of this total sporulating capacity, or 'inoculum potential' as it was then called, was used as an indication when pre-rain copper sprays had to be applied and how effectively the fungicide had reduced the bark inoculum. Based on these data the recommendations for chemical control were changed from pre-rain fungicide applications, to a spraying regime well into the rainy period, the accent being on protection of the berries rather than on a reduction of the bark inoculum. The fungicide Ortho Difolatan proved to be more effective than copper based compounds. Cultural practices, like the application of high levels of fertilizers, manure and mulch and rigid pruning practices, had no effect on the level of C. coffeanum in branches. Copper containing fungicides pushed the Colletotrichum balance in favour of C. coffeanum . Berries from non-copper sprayed coffee fields were less susceptible to standard conidial suspensions of C. coffeanum than berries from copper sprayed trees. A similar effect of fungicides should be considered in South and Central American coffee growing countries, where the application of fungicides has increased tremendously since the occurrence of Hemileia vastatrix Berk. et Br. in Brazil
Vascular functioning and development of the kiwifruit berry (Actinidia deliciosa)
No full textThe aim of this study was to understand kiwifruit berry development and the role of cell turgor and the phloem unloading pathway in development. Important aspects of berry development include the size of the fruit and its composition. The fresh weight growth curve of the kiwifruit berry was shown to be double sigmoid in shape. Dry weight accumulated linearly for the initial 139 days after anthesis (DAA). At this time the soluble solids concentration began to increase. Berry firmness was measured using two methods, with the penetrometer and with a new non-destructive method, utilising skinfold callipers. Both methods exhibited similar results, indicating that the skin callipers may be useful in the future for non-destructive berry rheological measurements.
Cell turgor was measured indirectly from measurements of symplasmic and apoplasmic solute potentials, and the matric potential of the berry. Apoplasmic sap, required to measure the apoplasmic solute potential, was extracted using two different methods the pressure chamber and through centrifugation. Measurements of sap osmotic potential suggest that the sap extracted using the centrifuge was contaminated with symplasmic sap, resulting in a negative cell turgor estimate. However, the pressure chamber technique provided apoplasmic sap that produced a more accurate estimate of cell turgor. Direct estimates of cell turgor were only obtained from the midpoint of the growing season because of contamination with symplasmic sap, but the values obtained were comparable to literature values for developing grape and tomato berries.
The phloem unloading pathway in the fruit was investigated using a symplasmic tracer dye, carboxyfluorescein diacetate coupled with 14C labelling and autoradiography. The phloem unloading pathway was symplasmic until 91 DAA when the dye was restricted to the phloem cells only, indicating a change to an apoplasmic pathway. However, due to the lack of functional unloading seen in radiolabelled samples, a change in the phloem unloading pathway could not be confirmed
Wendell Berry reads from his work
No full textClick on the PURL link below in the "External Files" section to play this video. The audio-only mp3 file is also available below in the "Files" section.Over the past half-century, no one has written more probingly or more influentially about the relations between culture and agriculture than Wendell Berry. His essays, short stories, novels, and poems have ranged eloquently over such subjects as marriage, community, work, farming, and the encompassing order we call nature. Mr. Berry will read selections from this powerful body of work
Wendell Berry reads from his work
No full textClick on the PURL link below in the "External Files" section to play this video. The audio-only mp3 file is also available below in the "Files" section.Over the past half-century, no one has written more probingly or more influentially about the relations between culture and agriculture than Wendell Berry. His essays, short stories, novels, and poems have ranged eloquently over such subjects as marriage, community, work, farming, and the encompassing order we call nature. Mr. Berry will read selections from this powerful body of work
Portrait of T. Berry Smith, Central College Physics and Chemistry Chair
No full textBlack and white photographic portrait of Thomas Berry (T. Berry) Smith, Chair of Physics and Chemistry at Central College (now Central Methodist University), taken in August 1897, wearing a light-colored shirt, light-colored collar and tie, and a dark jacket. 4.25" x 6.5". Inscription on the back gives Smith's name, degree, date of photograph, and his position at the College
Berry, T W, QX3714
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/371563Surname: BERRY
Given Name(s) or Initials: T W
Military Service Number or Last Known Location: QX3714
Missing, Wounded and Prisoner of War Enquiry Card Index Number: 6562182058
Item: [2016.0049.03890] "Berry, T W, QX3714
Administration Building, University of Idaho (1892-1906) fire scene. [51-24c]
No full text1906-03-32 photograph of Administration Building. View of the old Administration building on fire. Donor: Cleone T. Berry. [PG1_51-24c
T. Mann
No full textBerry Springs, Adelaide River. (During the war the Army made a swimming pool here).Mann, T.Date:195
berry-boxes
No full textberry1We used to go berry-picking, xxxxxxxx and take... some boxes,you know, berry=boxes, forty or fifty: a couple of us together. We'd fill them.YesDNE-cit J. WIDDOSON[-]= C1 or C2[-]Used I and SupUsed IUsed ISource appears in DNE I as T 1-631
Berry--Esséen bounds for finite-population t-statistics
No full textIn this paper, the Berry--Esséen bound for finite-population t-statistics is established under some mild conditions.Berry--Esséen bound Finite-population t-statistic Normal approximation
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