Temat: Phytophthora infestans - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Bottle necks in breeding late blight resistant potato
Autorzy:: Zimnoch-Guzowska, Ewa
Tatarowska, Beata
Powiązania:: https://bibliotekanauki.pl/articles/2198951.pdf
Data publikacji:: 2004-12-20
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: limitations
Phytophthora infestans
potato
resistance breeding
Opis:: The resistance to late blight (LB) is considered as a factor of major importance among resistances to potato pathogens. For four last decades more work has been done on potato resistant to Phytophthora infestans than on breeding for resistance to any other potato disease. Many sources of resistance have been known to breeders for many decades, but the results of their utilization are still disappointing. The difficulties in breeding for LB resistance were assessed by 39 participants of the survey organized for the Global Initiative on Late Blight (Zimnoch-Guzowska and Flis 2002), who indicated several major factors hampering progress in this area. The following factors found to be the most important bottle necks are discussed in the paper: (i) identification and utilization of new sources of resistance, not sufficient agronomic value of the used resistance sources; (ii) combination of earliness with LB resistance; (iii) complexity of genetic determination of LB resistance; (iv) combination of foliage and tuber resistance; (v) screening methods applied for resistance evaluation; (vi) cost of selection for resistance; (vii) lack of molecular markers (MAS) applicable to selection for LB resistance. limitations, Phytophthora infestans, potato, resistance breeding
Źródło:: Plant Breeding and Seed Science; 2004, 50; 71-79
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Reliability of different parameters to estimate relative foliage blight resistance and its relation to maturity in potato
Autorzy:: Darsow, Ulrich
Hansen, Jens G.
Powiązania:: https://bibliotekanauki.pl/articles/2198953.pdf
Data publikacji:: 2004-12-20
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: breeding
foliage blight
methods
potato
Phytophthora infestans
resistance
Opis:: A comparative study of different parameters calculated for foliage resistance of potato to Phytophthora infestans (Mont.) de Bary was conducted on the data for 27 cultivars and one prebreeding clone in field assessment in 2003 at BAZ Groß Lüsewitz. Relationships between the parameters and maturity were determined by linear regression. The strongest associations with maturity were found for the relative area under the disease progress curve (RAUDPC), delay of attack, and attack on a determined date (r2 = 0.47-0.52). The least association with maturity was found for foliage blight resistance at Groß Lüsewitz, FBRGL (r2 = 0.03), calculated by using a maturity-dependent section of the disease progress curve. The apparent infection rate (AIR), RAUDPC and delay of attack could only explain below 50% of variability of FBRGL. The method for calculation of foliage resistance in breeding developed at BAZ and named FBRGL is described in detail, and the usefulness of the different methods for evaluation of resistance, management of plant protection and breeding is discussed.
Źródło:: Plant Breeding and Seed Science; 2004, 50; 81-93
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Resistance to Phytophthora infestans in diploid and tetraploid potato families. 3. Correlations between characters
Autorzy:: Swiezynski, K M
Domanski, L
Flis, B
Osiecka, M
Sieczka, M T
Powiązania:: https://bibliotekanauki.pl/articles/2047151.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tetraploid
Phytophthora infestans
resistance
tuber shape
potato
diploid
Opis:: In four diploid and four tetraploid families correlations were evaluated between resistance to Phytophthora infestans of leaflets, tuber slices and whole tubers as well as correlations between three aspects of resistance and maturity or tuber shape regularity. A virulent P. infestans isolate was used for inoculations. Only in the family D4 a significant positive correlation was found between all the three aspects of resistance. Genotypes with susceptible leaflets and resistant tuber slices were not identified in any family. In some families genotypes with resistant whole tubers and susceptible tuber slices were found; the family D5 was found to have genotypes in which resistance of leaflets was associated with susceptibility of tuber slices. The resistance to P. infestans of leaflets or tuber slices tended to be negatively correlated with both early maturity and regularity of tuber shape.
Źródło:: Journal of Applied Genetics; 1997, 38, 2; 161-171
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The role of Phytophthora infestans oospores in primary infection of potato foliage in Poland.
Autorzy:: Zarzycka, Hanna
Lebecka, Renata
Sobkowiak, Sylwester
Powiązania:: https://bibliotekanauki.pl/articles/2198813.pdf
Data publikacji:: 2001-12-20
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: oospores
Phytophthora infestans
potato
primary inoculum
race characteristics
Opis:: The study on oospore formation ability under natural conditions was carried out on the base of comparative characterization of four local populations of P. infestans. It was found that oospores can be formed in potato tissues under natural conditions. The comparison of proportion of both mating types isolates, high level of race complexity and racial diversity indicates, that oospores in experimental fields could play a role as a source of primary inoculum in three experimental localities in Boguchwała, in Przychojec and in Olesno Śląskie.The oospores were produced also in all combinations of pot and field experiments. They were formed most abundantly, when the potato plants were inoculated with mixed inoculum consisted of A1 and A2 spores, in 1:1 ratio and significantly less abundantly, when the inoculum was dominated by one of mating type isolate. The effect of time of subsequent inoculation with A1 or A2 isolates on oospore formation was observed: significantly more oospores were formed when the plants were inoculated with both mating types at the same time.
Źródło:: Plant Breeding and Seed Science; 2001, 45, 2; 65-76
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Resistance to Phytophthora infestans in diploid and tetraploid potato families. 2. Resistance in tubers
Autorzy:: Swiezynski, K M
Flis, B
Osiecka, M
Sieczka, M T
Zarzycka, H
Powiązania:: https://bibliotekanauki.pl/articles/2046604.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Phytophthora infestans
tetraploid potato
genotype
resistance
potato
tuber
diploid potato
Opis:: The tuber reaction to Phytophthora infestans was evaluated in individual genotypes of four diploid and four tetraploid potato families, their parents and standard cultivars. The genotypes were tested several times. Two testing methods were used, based on evaluation of tuber slices or whole tubers, respectively. All inoculations were done with MP 245, a fungus isolate with a broad virulence spectrum. If the reaction of tuber slices was evaluated, the distribution of genotypes in several families deviated considerably from a normal one. In some distributions more than one peak was detectable, indicating segregation of major genes. Genotypes transgressive in resistance were found in four families. If the reaction of whole tubers was evaluated, the distribution of genotypes did not deviate significantly from a normal one. Genotypes transgressive in resistance were found in one family. The tuber reaction to P. infestans depended to a large extent on testing conditions.
Źródło:: Journal of Applied Genetics; 1997, 38, 1; 33-44
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Decision Support Systems for integrated control of late blight
Autorzy:: Schepers, Huub T.A.M.
Powiązania:: https://bibliotekanauki.pl/articles/2198946.pdf
Data publikacji:: 2004-12-20
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: Decision Support Systems
integrated control
late blight
Phytophthora infestans
potato
Opis:: All definitions for integrated control agree that maximum emphasis should be put on prevention by using resistant cultivars and cultural measures. Moreover, the use of plant protection products should be limited to the essential minimum using Decision Support Systems (DSSs) that integrate and organise all relevant information. Computer-based DSSs that require weather information and regular late blight scouting inputs have been developed and validated in a number of European countries. In the frame of the EU concerted action “European network for development of an integrated control strategy of potato late blight (EU.NET.ICP)” several DSSs were validated in 1999-2001. The overall conclusion was that in most cases the use of DSSs combined a good disease control with a reduction of fungicide input. The DSSs can be used as a PC-version but more and more, parts of information are delivered to users by phone, fax, e-mail, SMS and websites on the Internet. An important task for the near future is to update the DSSs with information on the epidemiology of the new aggressive population of Phytophthora infestans. Issues such as (1) the influence of temperature and relative humidity on the infection process, (2) the role of primary inoculum sources (seed, oospores, volunteers, dumps), (3) the role of secondary inoculum sources (distance, severity), (4) control of early blight and (5) resistance ratings for foliar and tuber blight have to be addressed in order to be able to formulate a robust control strategy that effectively controls late (and early) blight with a minimum input of fungicides.
Źródło:: Plant Breeding and Seed Science; 2004, 50; 57-61
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Incidence and harmfulness of potato late blight (Phytophthora infestans Mont. de Bary) on potato stems.
Autorzy:: Kapsa, Józefa
Powiązania:: https://bibliotekanauki.pl/articles/2198785.pdf
Data publikacji:: 2000-12-20
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: diseases
late blight
Phytophthora infestans
potato
localization of initial late blight infection
Opis:: Changes in the occurrence of the initial late blight symptoms have been noted in some regions of Poland. Observations of potato crops showed that occurrence of the primary infections and blight symptoms is sometimes on the stem rather than on the leaves. It was confirmed that in both cases, a cause of late blight was the same species Phytophthora infestans. Surveys of many potato crops done in 1997-1999, around Poland enabled assessment of the incidence of stem blight in Poland. In 1997 - 80.5%, 1998 - 65.2% and in 1999 – 72.4% of observed crops were primary affected with late blight on stems. Stem form of the disease appeared more often in the years with less rainfall in the period from June to July. The largest number of genotypes with initial blight symptoms on stems was observed among first early clones and cultivars. Glasshouse experiments confirmed the importance of stem lesions in decreasing yield and increasing tuber infection. Results confim that blighted tubers were the least probable source of the late blight appearing on stems.
Źródło:: Plant Breeding and Seed Science; 2000, 44; 53-61
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Sexuality of Phytophthora infestans and the role of oospores as a primary infection source of potato late blight
Autorzy:: Zarzycka, H
Sobkowiak, S.
Powiązania:: https://bibliotekanauki.pl/articles/65920.pdf
Data publikacji:: 1999
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Phytophthora infestans
oospore
potato late blight
pathogen
sexuality
sexual reproduction
potato
Opis:: Results of experiments with isolates A1 and A2 from populations occurring in Poland in the years 1993-1998 were compared. Mating types A1 and A2 did not significantly differ with respect of virulence spectrum, pathogenicity level and virulence diversity (Shannon index). After pairing isolates A1 and A2 formed oospores; their morphological characteristics were described. On selected fields a test was performed whether the oospores could play a role as a source of primary infection. Local populations occurring on three fields were characterized. Results obtained on investigated 3 separate fields, located in 2 voivodeships of southern Poland were compared. It was stated on the basis of the proportion of both mating type isolates, race complexity and diversity, that oospores could play a role as a source of primary infection, at least in one of localities in Boguchwała, podkarpackie voivodeship.
Drugi typ kojarzeniowy A2 został wykryty w Polsce w 1988 roku. Porównanie spektrum wirulencji i poziomu agresywności u izolatów obu typów kojarzeniowych A1 i A2 zebranych w latach 1993-1998 wykazało, że oba typy kojarzeniowe nie różnią się między sobą istotnie. Typ A2 nie stanowi większego bezpośredniego zagrożenia dla ziemniaka niż typ A1, lecz odgrywa rolę w procesie rozmnażania generatywnego. Oospory wytworzone w tkankach ziemniaka po skojarzeniu obu typów P. infestans mogą stać się, po przezimowaniu w glebie, drugim, obok zakażonych bulw, źródłem infekcji pierwotnej P. infestans. Aby odpowiedzieć na pytanie, czy oospory odgrywają rolę w wywołaniu infekcji pierwotnej, na polach ziemniaka dokonano scharakteryzowania lokalnych populacji P. infestans na 3 plantacjach ziemniaka. Porównanie wzajemnego stosunku izolatów obu typów kojarzeniowych oraz ocena złożoności i zróżnicowania ras wykazała, że oospory mogły być źródłem infekcji pierwotnej na polu w Boguchwale (woj. podkarpackie). Na innych polach patogen prawdopodobnie rozmnażał się na drodze wegetatywnej.
Źródło:: Journal of Plant Protection Research; 1999, 39, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Survival potential of Phytophthora infestans sporangia in relation to environmental factors and late blight occurrence
Autorzy:: Olanya, O.M.
Anwar, M.
He, Z.
Larkin, R.P.
Honeycutt, C.W.
Powiązania:: https://bibliotekanauki.pl/articles/65009.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: survival
Phytophthora infestans
sporangia
environmental factor
late blight
occurrence
climate variability
potato
tomato
Opis:: Potato is an important crop globally and late blight (Phytophthora infestans) often results in severe crop loss. The cost for late blight control can be in excess of $210 million in the United States. We utilised a non-parametric density distribution analysis of local temperature (T) and relative humidity (RH), from 2005 to 2009, to assess and validate sporangia survival potential using survival model and late blight risks during the potato cropping season at Presque Isle, in the northern part of the state of Maine, USA. Modelbased analyses showed that ambient temperatures of 3−30°C and RH values of 45−100% were conducive for sporangia survival. Disease outbreaks and risk periods coincided with a high sporangia survival probability (15−35%). Due to the omission of solar radiation (SR) in the computation of survival potential in previous research, we applied a Cox proportional model to estimate the probability of sporangia survival [i.e. hazard at a specific time H(t)] as a function of baseline hazard (H0) and the influencing parameters. The model is: H(t) = H0(t) × exp(0.067ET + 0.138T + 0.083RH + 0.001SR) where ET is exposure time. The survival model indicated that RH (β = 0.083) and T (β = 0.138) were significant (p < 0.05) factors in sporangia survival in comparison to SR (β = 0.001). The hazard ratio, indicative of sporangia survival risk, varied with the predictors. For the unit increase of T, sporangia survival hazard increased by 1.148 times. The Cox model and sporangia hazard probabilities can be used for short-term disease forecasts based on the risk period most conducive for pathogen survival and targeted fungicide applications for optimum late blight management.
Źródło:: Journal of Plant Protection Research; 2016, 56, 1
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Resistance to Phytophthora infestans in diploid and tetraploid potato families. 1. Resistance in detached leaflets
Autorzy:: Swiezynski, K M
Domanski, L
Osiecka, M
Sieczka, M T
Zarzycka, H
Powiązania:: https://bibliotekanauki.pl/articles/2046603.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tetraploid potato
Phytophthora infestans
inoculation
genotype
resistance
potato
detached leaflet
diploid potato
Opis:: Potato families, segregating for resistance to Phytophthora infestans, were tested repeatedly to evaluate the distribution of resistance to P. infestans, the repeatability of testing results and correlation between resistance and some other characters. Four diploid and four tetraploid families were evaluated together with their parents and with potato cultivars used as standard. For all inoculations a virulent fungus isolate MP 245 was used. Leaflets were collected from plants growing in the field (summer tests) or in a glasshouse (autumn and spring tests). Segregation of major genes determining resistance was detectable in most families. In families originating from mating a resistant parent with a susceptible partner some progeny genotypes with resistance level of the resistant parent could be identified. In families originating from two parents showing only some resistance, a transgression of resistance could be found in the progeny. The expression of resistance depended on testing conditions. Some genotypes were consistently superior or inferior in resistance under all testing conditions, but often repeated evaluations of genotypes did not provide consistent results and significant interactions genotypes x tests were detectable.
Źródło:: Journal of Applied Genetics; 1997, 38, 1; 19-32
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Assessing resistance to late blight of potato: methods used at the Scottish Crop Research Institute
Autorzy:: Stewart, Helen E.
Solomon-Blackburn, Ruth
Powiązania:: https://bibliotekanauki.pl/articles/2198944.pdf
Data publikacji:: 2004-12-20
Wydawca:: Instytut Hodowli i Aklimatyzacji Roślin
Tematy:: late blight
Phytophthora infestans
potato
resistance breeding
resistance test
screening methods
Solanum tuberosum
Opis:: At SCRI, wild species and clones of Solanum tuberosum are assessed for resistance to late blight in order to study the genetics and breed for resistance. Glasshouse progeny tests for foliage and tuber blight resistance, using true seedlings, are described. These enable the rapid screening of accessions of wild species, and the selection of the most resistant progenies in a breeding programme within one year of crossing. Assessment of the foliage resistance of clones is carried out in glasshouse tests of whole plants in flower-bud, and field trials using infector plants inoculated in the glasshouse with a complex race of Phytophthora infestans. The glasshouse test provides a reliable method of identifying R-genes and the virulence characteristics of blight isolates. The field trial gives the best estimate of field resistance and is being used to develop marker-assisted selection. Both tests are used to study the inheritance of resistance, to locate quantitative trait loci (QTL) and R-genes, and to select the most resistant clones. The tuber resistance of clones is assessed by spray-inoculating whole, immature, field-grown tubers on the day of harvest. However when large numbers of clones are involved, e.g. in the location of QTL, this is impractical, so glasshouse-grown tubers are dip-inoculated.
Źródło:: Plant Breeding and Seed Science; 2004, 50; 107-112
1429-3862
2083-599X
Pojawia się w:: Plant Breeding and Seed Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Effect of nozzle types and adjuvants on the leaf coverage and biological efficacy of fungicides in potato
Autorzy:: Kierzek, R.
Wachowiak, M.
Powiązania:: https://bibliotekanauki.pl/articles/65449.pdf
Data publikacji:: 2003
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Phytophthora infestans
fungicide
air induction nozzle
biological efficacy
plant protection
potato
leaf
adjuvant
nozzle type
Źródło:: Journal of Plant Protection Research; 2003, 43, 2
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: The reactive nitrogen species affect potato immunity to Phytophthora infestans
Autorzy:: Arasimowicz-Jelonek, M.
Floryszak-Wieczorek, J.
Abramowski, D.
Izbianska, K.
Powiązania:: https://bibliotekanauki.pl/articles/81084.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: conference
reactive nitrogen species
nitric oxide
peroxynitrite
potato
Phytophthora infestans
gene coding
thioredoxin peroxidase
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 3
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Use of the strips with plant mixture as method of increasing biodiversity and healthiness of organic potato plants
Użycie pasów z mieszanką roślin jako metoda podnoszenia bioróżnorodności i zdrowia ziemniaków w uprawie ekologicznej
Autorzy:: Kowalska, J.
Bubniewicz, P.
Powiązania:: https://bibliotekanauki.pl/articles/336580.pdf
Data publikacji:: 2014
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Maszyn Rolniczych
Tematy:: beneficial insects
mix plants
organic farming
Phytophthora infestans
potato
owady pożyteczne
mieszanka roślin
rolnictwo ekologiczne
ziemniak
Opis:: These studies present the results of use of mixture of sunflower (Helianthus annuus L.), climbing bean (Phaseolus vulgaris L.) and marigold (Tagetes L.) which was sown on the margins of organic potato fields. The necessary agrotechnical measures were performed. The plants on the margins were used as the mechanical barrier for spores of. P. infestans. Also beneficial insects occurring on margins were observed. As a control area it was used the field without the strips with mix of plants, but with the same agricultural practices. During growing season the healthiness of plants was monitored. Symptoms of late blight were noted. Beneficial insect living in the strips according to adjacent crops were noted, most insects were observed in the strips from the field of rape.
W pracy przedstawiono wyniki zastosowania mieszaniny roślin: słonecznika (Helianthus annuus L.), fasoli tycznej (Phaseolus vulgaris L.) i aksamitki wzniesionej (Tagetes L.), która została zasiana jak pas brzeżny na polach ziemniaka, gdzie przeprowadzono niezbędne zabiegi agrotechniczne. Rośliny w mieszance wykorzystano jako barierę mechaniczną dla zarodników. P. infestans. Notowano występowanie owadów pożytecznych na obrzeżach. Jako powierzchnię kontrolną wykorzystano pole bez siewu brzeżnego, z tymi samymi zabiegami pielęgnacyjnymi. Zdrowotność roślin była monitorowana, notowano niższe objawy zarazy ziemniaka na powierzchni z obsiewem. Liczebność owadów pożytecznych była zróżnicowana w zależności od uprawy przylegającej do pasa brzeżnego, najwięcej owadów obserwowano od strony pola z rzepakiem.
Źródło:: Journal of Research and Applications in Agricultural Engineering; 2014, 59, 3; 129-131
1642-686X
2719-423X
Pojawia się w:: Journal of Research and Applications in Agricultural Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Monitoring of Phytophthora infestans development with a luminancemeter
Autorzy:: Wojtowicz, A
Piekarczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/65676.pdf
Data publikacji:: 2001
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Phytophthora infestans
fungicide
plant protection
development
monitoring
spectral radiance measurement
potato
vegetation index
potato cultivar
Opis:: Two potato cultivars, sprayed and nonsprayed with fungicides, were evaluated to determine the association of late blight (caused by Phytophtora infestans) and radiometric leaf reflectance to disease development. Spectral radiance measurements were taken with CIMEL CE3132 luminancemeter in the visible (450 nm, 550 nm and 650 nm) and near-infrared (850 nm) range of the electromagnetic spectrum. The measurements were taken at two view zenithal angles: ɸv= 0° (at nadir) and ɸv = 50°. Six vegetative indices based on these measurements were used to detect differences between sprayed and nonsprayed plants. Vegetation indices based on the reflectance measurement enable to distinguish infected potato plants from noninfected plants. Among the vegetation indices used in this studies the best indicators of disease were NIR/RED and ELAI. Results of our study show that for Mila cultivar oblique viewing may be more effective then nadir viewing (perpendicular to the ground surface) for distinguishing between plants infested at different degree.
Opracowanie technik teledetekcyjnych służących do wykrywania i obserwacji rozwoju chorób roślin wymaga poznania ich właściwości spektralnych. Służą temu polowe pomiary spektralne roślin, których celem jest stwierdzenie różnic w ilości pochłanianego i odbijanego promieniowania słonecznego przez rośliny chore i zdrowe. Zastosowanie wskaźników wegetacyjnych, czyli porównanie od bicia fal elektromagnetycznych o różnych długościach od tego samego obiektu w tym samym czasie, może stanowić lepszą podstawę do opisu jego charakterystyki spektralnej niż pomiary odbicia każdej z fal analizowane oddzielnie. Celem badań było stwierdzenie, który ze wskaźników wegetacyjnych obliczonych na podstawie zmierzonych danych spektralnych najbardziej nadaje się do wykrycia zróżnicowania między zdrowymi i chorymi roślinami ziemniaka. Ponadto podjęto próbę uzyskania odpowiedzi na pytanie, czy pomiary wykonywane pod kątem innym niż 0° umożliwiają łatwiejsze zidentyfikowanie chorych roślin.
Źródło:: Journal of Plant Protection Research; 2001, 41, 3
1427-4345
Pojawia się w:: Journal of Plant Protection Research
Dostawca treści:: Biblioteka Nauki

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