Abstract
AbstractThe development of detection of insect infestations from aircraft was reviewed. It started with visual observation and written records, and developed to photographic recording with color films and infrared films, then to enhancement of photographic images.Aerial photography was used to detect simulated insect defoliation in corn fields. Several guide‐lines were established: defoliation on top of plant was easily detected while that on the base of plant was less so; aero infrared film with a Wratten 89B filter gave the best results, morning flight at the scale of 1: 15,840 is to be recommended, and row direction, plant growth stage and time elapse since defoliation were not important factors.The multiple uses of aerial photography in agricultural monitoring were proposed, and the research needed to implement the proposed scheme was outlined.The potential and limitations of remote sensing from spacecraft such as the Earth Resources Technology Satellite and the SKYLAB were discussed.
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