APPLICATIONS PROGPAMS 
  
  
  
  
REMOTE SENSING STUDIES IN COFFEE BY THE BRAZILIAN INSTITUTE OF COFFEE 
(1.5.0) 
The Photointerpretation Service of IBC has developed 
a research programme in remote sensing since 1969 for the survey 
of certain aspects of the coffee crop in Brazil. Up until the 
present, the following research studies have been initiated: 
1. Frost attack studies (Frost Mission) 
2. Coffee leaf rust studies (Caratinga Mission). 
FROST ATTACK STUDIES 
A frost damage study was started in November 1969 .- 
and consisted of a flight test of Ektachrome IR and Color for the 
detection and measurement of various degrees of frost attack. 
This study was carried out in a pilot area in Parana State. The 
results were compared with black & white panchromatic imagery and 
a thermal sensor data (PRT-5). 
The results indicated a good correlation between the 
spectral band separated photocopies (especially from Ekta-IR) and 
the field data records. This is a five years study, and field da 
ta on the production recovery is. being collected at each harvest 
within the test site (the 1969-1971 recovery in production corre- 
lates well with the damage observed on the basis of photo images 
mentioned above). Table VI shows a summary of results. 
COFFEE LEAF RUST STUDIES 
  
A coffee leaf rust study was initiated in June 1970 
and was designed as a pilot study in the application of Ektachro 
me IR and Color Film in the detection of coffee infected with He 
mileia vastatrix. The tests were completed in the state of Minas 
Gerais. Analysis was completed using spectral band separation - 
on the basis of filtered densitometric readings. The results of 
this study indicated a colour balance problem in the Ektachrome 
IR film associated with the IR-sensitive layer. A complete ana- 
lysis was carried out using the Color Ektachrome imagery. Where 
as the field colour scales used correlated well with the imagery 
obtained, this did not permit an effective separation of the di- 
sease-affected trees from those with other conditions. Table VII 
shows a summary of results. 
REMARKS 
The experience gained in multispectral analyses com 
pleted with the remote sensing tests in coffee has brought IBC to