Home / Quizzes / July 23 QuizQuiz July 23, 2014 July 23 Quiz 1. What two insects require sweeping netting to match field populations with economic thresholds? Choose two from the list. Bertha armywormCabbage seedpod weevilDiamondback moth larvaeGrasshoppersLygus 2. Diamondback moth larvae at threshold levels are really only a threat if they’re eating _______. LeavesFlowersPods Stems 3. When scouting for this insect, you have to shake all canola plants within a determined area (50 cm by 50 cm is an appropriately sized area) and then count how many of these insects you find on the ground. AphidsBertha armywormLygusRed turnip beetle 4. This is a mystery question. We don't know what this is and are hoping you can help us. Have you seen this before? What is it? Note: You don't have to answer this if you don't have an educated guess. It won't count against your quiz score. (Photo source: Katrina Martfeld) Loading... E-newsletter sign up +(opens in a new tab)Agronomy Fundamentals Explore articles on the best management practices for yield, profitability and sustainability:Plant Establishment Nutrient Management Diseases Insects Weeds Harvest and Storage Discover More Canola Encyclopedia (opens in a new tab)Past Issues (opens in a new tab)Canola Research Hub (opens in a new tab)Videos (opens in a new tab)