After a complete fish kill on the 2-km-long, spring-fed headwater section of Garvin Brook, brown trout (Salmo trutta) population was studied over next 29 months to examine relative roles spawning migration adults and natural reproduction in recovery process. Spawning redd counts during two seasons post-kill, repeated surveys reference zones, were conducted assess adult total changes shifting ag...

Secondary kill of the German cockroach, Blattella germanica (L)., by baits was reported to increase the overall control efficacy of bait products. However, most studies have been based on laboratory strains and small nymphs. We compared the secondary kill of four cockroach gel baits against various developmental stages of a laboratory (Jwax) and a field (Dorie) strain B. germanica. The four bai...

Two types of kill strips, Hercon Vaportape II and Plato Insecticide Strip, are used by boll weevil, Anthonomus grandis (Boheman), eradication programs in the United States (U.S.). Both types utilize dichlorvos as the killing agent and are typically replaced in traps on a four-week interval. However, published information on the duration of effectiveness of kill strips is not available and some ...