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Canola Watch quiz – bertha armyworm
Test your bertha armyworm identification and scouting skills with these 6 questions. 1. The following are all features of bertha armyworm, but which one best distinguishes bertha armyworm from other…
Read moreSearch Results for: bertha
Which worm is it: bertha, diamondback or cabbage?
Many growers are spraying for bertha armyworm, even though a forecasting program based on collecting adult moths in pheromone-baited traps had reported low bertha armyworm moth counts in most areas….
Read moreStation 2: Bertha, diamondback and their natural enemies
…armyworms. Tachinid eggs hatch within minutes, and the tiny larvae bore into the bertha’s body. When these two natural parasitoids reach levels where they’re attacking 60% of the bertha population,…
Read moreInsect update: Lygus, berthas and more
…interactions. The white spot on the back of this bertha armyworm is a tachinid fly egg. This is a natural parasitoid of bertha armyworm. Photo credit: Shelley Barkley Grasshoppers. Populations…
Read moreBertha armyworm update
…have been a low threat to canola this year. But some fields can encounter higher populations while others nearby have few or none. Bertha armyworm scouting tips Bertha armyworm thresholds…
Read moreBertha armyworm on the move soon
…to link to MAFRI’s bertha armyworm factsheet. Bertha armyworm scouting tips —It is easiest to locate the larvae in early morning or in the evening when they are up feeding…
Read moreBertha armyworm near economic thresholds
…by 50%. Bertha armyworm larvae tend to eat leaves first, but will feed on stems and pods if plants drop their leaves before the larvae are mature. Mature bertha armyworm….
Read moreInsect update: Lygus, bertha
…decide to spray, consider spraying only the patch. These are likely all bertha armyworms, showing the variation in color that can make identification a challenge. Mature bertha armyworms come in…
Read moreBertha armyworm scouting tips
These are all bertha armyworms, showing the variation in color that can make idenfication a challenge. The number of bertha armyworm larvae on a farm last year is not a…
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