Physical barriers and mulches

The environment of a pest can be disrupted using physical barriers or mulches. Barriers may be quite subtle in form, such as those composed of soil particles that are too large for termites to displace with mandibles, yet too small for termites to pass between (Su and Scheffrahn, 1998) or obtrusive, such as stainless steel mesh barriers used for pre-construction installation in houses to prevent termite foraging (Lenz and Runko, 1994; Grace et al., 1996). Other types of barriers include reflective plastic mulches and netting tunnels which can repel insects or reduce the transmission of viruses (Stapleton et al., 1994). Nets have been shown to offer protection to cauliflowers against Delia radicum, Brevicoryne brassica and Lepidoptera, and to Japanese radishes against Delia radicum (Ester et al.,

1994). Reflective mulches have proved particularly effective in preventing insect colonization. Flying aphids are not attracted to plants growing close to white or reflective surfaces. Reflective surfaces such as aluminium foil, reflective polyethylene films and reflective powders have been used to repel aphids and reduce incidence of virus diseases (Henshaw et al., 1991; Stapleton et al., 1993). More recently, biodegradable spray mulches have been successfully used (Stapleton et al., 1994; Summers et al., 1995).

Oplan Termites

Oplan Termites

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