Abstract: Image analysis apparatus comprises a two dimensional array of photodetectors (80) for receiving light from pixels of a display screen (90). The intensity values generated by the photodetectors (80) in response to incident light from the pixels are stored in a memory (40). The photodetectors' spatial geometry is mapped onto the display screen's known pixel geometry. A processor (50) determines one or more performance parameters of the display screen (90) as a function of the intensity values stored in the memory (40) and of the photodetectors mapped spatial geometry (80). Calibration and correlation problems associated with prior art measurement techniques are avoided by mapping the spacing of the array of photodetectors onto the known geometry of the display pixel structure. Also, the apparatus can be conveniently incorporated into a handset and therefore does not require complicated positioning jigs in use.

Abstract: Non-phytotoxic antidotally effective amounts of compounds having the formula ##STR1## in which R is selected from the group consisting of haloalkyl having 1-4 carbon atoms and alkylamino having 1-4 carbon atoms;R.sub.1 is selected from the group consisting of alkyl having 1-4 carbon atoms, haloalkyl having 1-4 carbon atoms and chloro; andR.sub.2 is selected from the group consisting of haloalkyl having 1-4 carbon atoms and N-dichloroacetylethylamino protect crops from thiolcarbamate herbicidal injury.

Abstract: The novel compound diethyl 2-pyridine thionophosphonate ##STR1## has been found to possess insecticidal activation properties when combined with the known insecticide N-(mercaptomethyl) phthalimide S-(O,O-dimethyl phosphorodithioate).

Abstract: Novel compounds of the formula ##STR1## wherein R is lower alkyl, cycloalkyl, cycloalkylmethyl, aryl, or aralkyl are useful as plant growth regulators.