Insects

To identify a problem, start with careful scouting. Use this checklist and then move on to the Canola Diagnostic Tool.

Lygus hotspots: Lygus numbers are high in some regions, with reports of 70+ per 10 sweeps in some fields in central and northern Alberta.

Threshold tables for lygus suggest, for example, that if canola is $12 per bushel and spray costs $8 per acre, the threshold at the

Bertha armyworm is one pest that can do a lot of damage in a short time. They’re large and eat a lot. Even within

Thresholds are 100-150 larvae per square metre in immature to flowering plants and 200-300 larvae per square metre (20-30 per square foot) in plants

Pre-harvest interval (PHI) refers to the amount of time that must lapse (in days) after a pesticide application before the crop is cut. Cutting

When strange patterns of damage in canola fields line up perfectly with the sprayer boom width or follow typical drift patterns, phone calls and

While insects are not a major threat in most fields at this point in 2014, diamondback moth larvae are around, cabbage seedpod weevil are

The goal when spraying cabbage seedpod weevil (CSPW) is to stop adults from laying eggs in newly formed pods. CSPW don’t do their damage

Beneficials. Lygus, bertha armyworm and diamondback moth have a number of natural enemies that will keep populations in check. These beneficial insects may not

1. Flowering percentage to determine timing for fungicide. The photo above from NDSU shows canola at 20% flower, which is when the application window

Canola crops side by side can have different risk factors, and often do not require the same crop management for nutrients, weeds, insects and