The insect does not overwinter in Michigan (see notes section) and flies in on wind currents in the spring. There are several species that can be a problem on turf. If control is necessary, contact your state Cooperative Extension Service or click here for control materials and rates.The adults are nondescript brown or grey moths (Image A & B). The following table may help in making replanting decisions. The minimum number of plants per foot normally needed for good yields at different row spacing, if plants are not under stress, is as follows: If cutworms are threatening the stand to the level that plant population will be a limiting factor for good yields, treatment may be needed.
Soybean Insect Control Recommendations: E-series 77-W (PDF)ĭamage from all cutworm species should be considered together. Also, determine the species causing the damage. Determine the average length for the worms sampled. Collect 2 cutworms from each sample set for a total of 10 and record the length of each worm. Be sure to monitor those areas of the field where cutworms are most likely to be found (wet, weedy areas).Īlso, look for live cutworms around damaged plants. Look for leaf feeding that may be due to cutworms too small to cut plants. Record the number of cut or damaged plants for each area and the field as a whole. Check 20 plants in each of 5 areas of a field (100 plants). Walk fields as plants emerge to monitor for cutworm damage. Some cutworms may be easily overlooked because their body colors blend in with the soil. To find them, examine the top 3 inches (7.6 cm) of soil around damaged plants. Cutworms remain hidden in the soil during the day, but may feed throughout the day below the soil surface.
0 kommentar(er)
