Arable farming in New Zealand is intensive and getting the highest return on investment from weed and insect control is critical to success. Weed competition will impact on yield if left unchecked, the earlier weeds are controlled the better, thus allowing available nutrients and sunlight to be directed into crop production. Taking a proactive approach to managing weeds will overtime reduce the numbers of weed seeds in the soil seed bank and ultimately reduce the burden in subsequent years.
Insects damage can occur both above and below the soil surface. Chewing and sucking pests such as cut worm and aphids inhibit growth and spread disease. It is important to manage insect pest levels and spray when thresholds are reached to maximise crop yield.