Fishing – trapping – and vermin destroying – Traps – Insect
Patent
1995-11-03
1998-04-14
Rowan, Kurt
Fishing, trapping, and vermin destroying
Traps
Insect
43114, 43121, 431321, A01M 120
Patent
active
057378703
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to bait suitable for attracting and/or arresting insect and/or arachnid pest animals, particularly storage pests such as mites, and further relates to a trap for mounting such bait in use. Also provided is a method for use of the bait and trap for pest control and/or assessment of infestation status of stored produce and premises dealing with storage, production and distribution of such produce. Preferred traps include microbial indicators capable of detecting specific microorganism associated with the pest animals.
Various environments are subject of infestation by insect and arachnid pest animals such as cockroaches, beetles and mites; particularly environments such as stored consumable produce, such as grains, and premises dealing with storage, production and/or distribution of these. It is known to use baits to trap these pests.
A first known type of pest bait currently in use is a mixture of cereal, peanut and carobs deployed in the form of bait bags consisting of rectangular perforated plastic bags containing the mixture. These bags are used for trapping a wide variety of insect pests but may be used to trap mites by virtue of the attractant power of the high moisture content carobs. However, the bags are not specifically designed for the task and enumeration of trapped mites is slow and inefficient; separation from the bags involving shaking them over a container. This process, although well suited for isolation of insects, is inefficient and extremely destructive for mites, and thus prevents their further study once isolated.
In dusty production and distribution areas the effectiveness of bait bags is diminished due to their large apertures which allow a considerable quantity of fine powdery debris to settle inside them. Isolation of mites from debris contaminated bags is inefficient and labour intensive.
A second known type of bait in use is fish meal and is deployed in the form of a moistened filter paper having the meal placed at its centre. The paper is covered with a petri-dish raised from its surface by a few millimeters, eg. using paper clips. In this trap moisture plays an important Pole in attracting the mites and thus attractancy is short lived due to the absence of a moisture regulating mechanism. In addition such traps are easily disturbed and it is difficult to set and retrieve them from confined spaces. Again, the procedure for detecting and isolating mites from such traps is labour intensive and requires experienced personnel.
It is known to trap insects using carrageenan gel baits wherein carrageenan is used as both gelling agent and insect attractant which leads to the bait being ingested (see WO 91/07972). In this bait the carrageenan is used with quantities of 25% or 98% water by weight for attracting cockroaches and 50% water by weight for ants; in each case the bait is insecticidal and the attracted insects are killed on its ingestion. The trap or bait are not shown to work with mites and, indeed, carrageenan is found not to be an attractant for mites by the present inventor and they are not suited to suspension in produce.
It is known to use live nematodes as bait fop killing insects whereby live infective juvenile nematodes are supported in a gel impregnated into a reticulated foam with a 1 to 5 mm region at its top being in the form of a high surface area which must be dry to encourage nictation (see WO 92/08356); carrageenan or agar set with hygroscopic salts are used as nematode slow release support gels. This document notes that cockroaches are attracted to moist closed spaces and provides this using liquid water supplied through a water permeable membrane or from a separate water liberating swelled polyacrylamide gel to that which acts as support to the nematodes. Suspension in product is not disclosed.
Other bait and pesticidal compositions of gelled nature are known. Fishing baits are known made from tamarind gum, egg yolk, shrimp mince. D-sorbit and agar with about 33% by weight water content.
It is known to apply fungi in agar gel to man
REFERENCES:
patent: 4218842 (1980-08-01), Anderson
patent: 4520015 (1985-05-01), Pesche
patent: 4930251 (1990-06-01), Crisanti
patent: 5009710 (1991-04-01), Bewsey
patent: 5172514 (1992-12-01), Weber
patent: 5238681 (1993-08-01), Chang
patent: 5396729 (1995-03-01), Vejvoda
WPI Abstract Accession No. 78-35942 A/20 & JP53/038594 (Lacton Kagaku Kogyo) Fishing Bait.
Rowan Kurt
The Minister of Agriculture Fisheries and Food in her Britannic
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