ABSTRACT
Douglas fir seeds treated with the more promising chemicals were similarly evaluated. Other tests carried out involved longer feeding periods. Two compounds which have received attention recently as seed protectants are methiocarb and thiram. The latter is commonly used as a fungicide and the former is an insecticide which is also used as a bird repellent. A commonly used test to assess the effectiveness of repellents for use in packaging involves the placement of a treated barrier between the test animal and its food. Rodents will usually gnaw the treated barrier but will not necessarily taste the repellent because they possess a diastema through which nonedible materials can be ejected from the mouth without tasting. Repellents for the other uses mentioned are either too toxic (e.g., actidione, chloropicrin) or too aversive to humans and domestic animals to have any practical applications.
