Principles of Integrated Pest Management IPM OMSP611 Cultural control Prof. J van den Berg Cutworm and severed maize seedling Weedy fields during winter months support cutworm populations Removal of weeds depletes the food sources of cutworm larvae Agrotis segetum - cutworm Study in detail the popular paper by TW Drinkwater. I send a scanned copy. Weed management is an excellent strategy through which this pest can be managed. Radiatorbossie Witblombloudissel Ouer saailinge (4-blaar): • Netjiese ronde gaatjie in stam, net onder grondoppervlak • Saailing verwelk (agtergrond inligting) Biologie • Regdeur die jaar • Eiers gelê in herfs /winter • Larwes oorwinter in alle groottes tot lente • Augustus/September: papieselle (motte na 2 weke) • Eiers op onkruid of mielies • L1/L2 larwes: op grond, onder onkruid /organiese materiaal • L3+ larwes: onder grond – kom slegs snags uit Management of Agrotis segetum can be done by keeping fields free of weeds for 5 weeks prior to planting. Larvae die of starvation since food plants are absent. If cultivation is done 1 or 2 weeks before planting – cutworm damage is highly likely. If, for example, glyphosate is applied to a herbicide tolerant GM crop after maize seedling emergence, the weeds in this field will die, which will cause cutworm larvae to start feeding on maize. Scenecio consanguineous Hongerbos Radiatorbossie ASSIGNMENT: Write a 3-4 page essay in which you: 1. Provide a detailed description of the concept of cultural control. 2. Give examples of cultural control strategies for: a) cutworm (Agrotis segetum) b) false stink bug (Nysius natalensis) For each of the two examples above, describe the biology of the pest (use photos from internet), and, in a Table, list at least five host plant species (scientific names) of each pest. Describe the cultural control strategy that can be used to manage these pests. Refer to the scientific papers provided as well as the popular papers.
