Use of pesticides in systems for central storage of grain
1986
Webley, D.J.
Use of pesticides in the central bulk storage of grain is described. A very high standard of freedom from insect pests is demanded. The two methods of achieving this are the use of residual chemical protectants and the use of fumigants or inert atmospheres in sealed storages. Chemical protectants are easily applied, effective, and do not require a high standard of storage structure or technology. The prohibition of many of the fumigants formerly used for grain storage has led to the use of residual chemical protectants becoming much more wide spread. Their major disadvantages are the tendency of insects to develop resistance to them and the presence of residues. Despite the extensive codex approval system, countries vary in their acceptance of the use of insecticides, and the presence of residues must be carefully monitored. Sealed storage requires some additional capital cost and there is a greater need to reduce the moisture content of the incoming crop. The validity of this type of storage technique for the humid tropics is still being researched. There is also a need for some form of rapid disinfestation measures in central storage systems. The current options in this regard are discussed
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