The archaebacterium Methanococcus voltae, was shown to be chemotactic. Acetate, isoleucine, and leucine were identified as attractants; whereas histidine was not an attractant. A motile, generally nonchemotactic mutant was isolated.

BACKGROUND British mosquito population distribution, abundance, species composition and potential for mosquito disease transmission are intimately linked to the physical environment. The presence of ponds and water storage can significantly increase the density of particular mosquito species in the garden. Culex pipiens is the mosquito most commonly found in UK gardens and a potential vector of...

Shortly after Kangas et al. (1) reported that a-terpineol was the major component of a primary host attractant for Blastophagus piniperda L., Silverstein, Rodin, and Wood (2) revealed the identity of three other terpene alcohols that play a role in the orientation of bark beetles. However, Silverstein et al. concluded, from laboratory bioassay, that a mixture of the three terpene alcohols they ...

Protection of Norway spruce stands using anti-attractants was tested during an outbreak bark beetles (Ips typographus) in their spring flight. The aims this study were as follows: (1) to test the proposed experimental design for tree protection; (2) evaluate height-specific alternatives dispenser installation on trees; and (3) efficiency protection measures under beetle infestation drought stre...

It has previously been reported that the alpha-proteobacterium Azospirillum brasilense undergoes methylation-independent chemotaxis; however, a recent study revealed cheB and cheR genes in this organism. We have constructed cheB, cheR, and cheBR mutants of A. brasilense and determined that the CheB and CheR proteins under study significantly influence chemotaxis and aerotaxis but are not essent...

Attractants for pest monitoring and controlling can be developed based on plant volatiles. Previously, we showed that tea leafhopper (Empoasca onukii) preferred grapevine, peach plant, and tea plant odours to clean air. In this research, we formulated three blends with similar attractiveness to leafhoppers as peach, grapevine, and tea plant volatiles; these blends were composed of (Z)-3-hexenyl...

Mass trapping has proven to be a powerful weapon in the control of Ceratitis capitata (Wiedemann), and its application in Mediterranean countries has currently increased notably as a control method. In this study, the efficacy of newly developed traps and dispensers of attractants were assessed with the aim of finding the best trap and set the lifetime of the dispensers, thus improving the tota...