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Evaluating the impact of expansion on urban thermal surroundings: A case study of Lahore Metropolitan city, Pakistan

100%

Khan U. A.

Environment, Earth and Ecology

2020

tom 4

nr 1

Monitoring of Phytophthora infestans development with a luminancemeter

100%

Wojtowicz A., Piekarczyk J.

Journal of Plant Protection Research

2001

tom 41

nr 3

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.

Ograniczanie wyników

1 Environment, Earth and Ecology

1 Journal of Plant Protection Research

1 Khan U. A.

1 Piekarczyk J.

1 Wojtowicz A.

1 2020

1 2001

Wyniki wyszukiwania

Evaluating the impact of expansion on urban thermal surroundings: A case study of Lahore Metropolitan city, Pakistan

Monitoring of Phytophthora infestans development with a luminancemeter