Before Applying Pest & Insecticides Into Your Garden Note The Following

Before Applying Pest & Insecticides Into Your Garden Note The Following

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By Spy Uganda Correspondent

Pests and diseases of pastures/crops can severely impact their productivity and the profitability of an enterprise.

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The types of pests and diseases that affect pastures vary depending on the type of pasture, the region and the season.

Pasture pests include vertebrates, invertebrates, weeds and diseases. In this context, ‘pests’ describes invertebrates including red-legged earth mite, blue oat mite, heliothis caterpillars, black-headed cockchafers, diamondback moth, aphids and lucerne flea.

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Not all insects that live in pastures are problematic and there is a range of invertebrates that benefit pasture growth by preying on pests. These are known as ‘beneficial insects’ and include carabid beetles, predatory mites, native earwigs, brown lacewings, ladybird beetles and parasitic wasps.

While insecticides can be used to control pest species, they will also usually affect beneficial insects. An integrated approach to pest control that minimises insecticide use is often the most effective and sustainable approach.

Integrated pest management (IPM) involves using a combination of biological, cultural and chemical methods to control pests.

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As beneficial insects are a key component of IPM, the use of insecticides is minimised, but not excluded altogether.

The first step in IPM is to identify and understand the lifecycle of the pests and beneficial insects present. A plan can then be put in place to manage the populations of both beneficial and pest insects.

Careful and ongoing monitoring is then required to ensure that a favourable population is maintained. Monitoring also allows corrective actions, such as slashing, pasture rotation or spraying, to be undertaken when pest numbers impact pasture production.

Diseases and deficiencies pose a similar risk as pests and should be monitored when checking pastures for pests.

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Diseases can generally be classified as leaf diseases such as rusts or root diseases such as wilt or root rot.

Management for disease control should be both proactive and reactive. Proactive control begins prior to pasture establishment and takes into consideration paddock and disease history as well as pasture species selection for disease resistance.

Reactive disease control involves managing outbreaks and may include strategic grazing and chemical application. In extreme cases, cultivation and cropping may be required to break a disease cycle.

Where chemicals are used to control pests and diseases, be careful to abide by all export slaughter intervals (ESI) and withholding periods (WHP) associated with the particular chemical.

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