Spotted cutworms routinely remain under grapevine bark in all production areas. In the San Joaquin Valley variegated cutworm larvae do not return to the soil but rather move under the bark. In the North Coast, the variegated cutworm normally returns to the ground during the day but may also remain under the bark of the vine. Variegated cutworm is the predominant species in the San Joaquin Valley and North Coast, while spotted cutworm is predominant in the Central Coast counties. A hand lens is needed to detect these hairs. Of the cutworm species that attack grapes, brassy cutworm is the only one with hairs protruding from the compound eye area. Mature brassy cutworms are 1.0 to 1.2 inch (2.5–3 cm) long and are reddish or brassy in appearance. A row of dark or black triangular markings are found on each side of the dorsal body surface. Mature spotted cutworms are about 1.3 inch (3.5 cm) long and are a dull gray brown. Body color varies from pale gray to dark mottled brown intermixed with red and yellow dots along the dorsum. Mature variegated cutworm larvae are 1.5 to 2.0 inch (3.8–5 cm) long with smooth skin. Positive identification is important as behavioral differences affect control actions.

For detailed instructions on application techniques, download the technical sheet or consult your Bioline advisor for more information.Cutworms are inconspicuously marked, dull-colored caterpillars ranging from 0.6 to 2.0 inch (1.5–5 cm) in length.

Do not exceed a pump pressure of 20 bar/ 300psi, for Dosatron 6 bar/ 100psi.

Keep nematode solution agitated continuously alternatively add carboxy-methyl cellulose (wallpaper paste) at 0.4% w/v to prevent nematodes settling, mixture should still be used within 4 hours.

Use nozzles with at least 0.8 mm diameter.

Remove all fine filters in the tubing and at the nozzles.

The entire spray solution should be applied once mixed.For optimum results, keep the soil moist for 3-4 weeks after application.

For drench applications over foliage use lower volumes of water and irrigate within 30 minutes of treatment with at least 1 litre/ m2 to wash nematodes off the leaves and below the soil surface.

Apply with at least 4 litres / m2 water if applied direct to soil.

The soil surface should be moist at the time of application.

Turn off artificial lights which may dry plant surfaces too quickly.

Apply early morning or late evening to minimize the effect of heat and sunlight.

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