Abstract: The invention provides methods and oligonucleotide primers for assaying Brassica napus plants for the presence or absence of mutations that confer resistance to imidazolinone herbicides. Specifically, the methods and primers of the invention are useful for detecting the PM1 mutation of the B. napus AHAS1 gene and the PM2 mutation of the B. napus AHAS3 gene.

Abstract: There is disclosed an apparatus and method for treating trees. The apparatus includes an injecting device for injecting articles into trees. The device provides a plurality of article retaining tubes fixedly connected to a removable and rotatable delivery head and stationary therewith. A slidably mounted injection member is provided which slides coaxially along the tubes from a non-injecting position to an injecting position for injecting an article into a tree.

Abstract: There is provided a first stop device having a closure for a conduit passing through an aperture extending through a wall, floor or the like. According to this invention, the conduit passing through the aperture is formed of a low melting point, fugitive metal having a relatively short melting point, e.g., a bismuth-based metallic alloy or lead-tin alloy. A closure housing is disposed parallel to the wall, floor or the like, with one end of the closure housing being disposed adjacent to one surface of the conduit. A fire-resistant closure plate is slidably mounted within the closure housing, the closure plate being spring biased to be in contact with that surface of the conduit. In the event of a fire, at least the portion of the conduit which is in contact with the fire-resistant closure plate is melted almost instantaneously to be in liquid form and so becomes dissipated.