Decis Forte

Decis Forte is a proven, quick acting synthetic pyrethnoid insecticide providing broad spectrum control of destructive insect pests, in a wide range of New Zealand fruit and vegetable crops. Decis Forte is non-systemic and works through contact activity and ingestion, and as such, thorough plant coverage is essential. Decis Forte is an accepted solution used by growers as part of a insecticide programme to ensure financial returns and crop profitability.


  • Healthy crops = higher yields = better return on investment and profitability.
  • Provides grower peace-of-mind as a fast acting, broad spectrum insecticide commonly used as a key element within successful pest control programmes.
  • Pure isomer formulation provides high biological activity with lower dose rates.
Pack size 5L.

Please download product label for full use guidelines.

Using Decis Forte on Beans

Insect Pests: Looper caterpillar

Use 360 ml (400 ml)/500 - 600 L water/ha, or 36 ml (40 ml)/100 L and apply at first sign of damage. Repeat as necessary.

Using Decis Forte on Eucalyptus

Insect Pest: Tortoise beetle 

Combine 450 ml (500 ml) with a suitable adjuvant oil at recommended rates.

Using Decis Forte on Lucerne

Insect Pest: Aphids 

Use 650 ml/ha. Apply up to two applications at 7 day intervals as part of a programme in sufficient water to ensure good coverage of all foliage.

Insect Pest: Sitonia weevil 

Use 225 ml (250 ml)/ha in at least 250 L water/ha.

Using Decis Forte on Maize and Sweetcorn

Insect Pest: Corn earworm 

Use 360 ml (400 ml)/ha. Apply in the evening as a directed spray to thoroughly cover the base of plants. Rain within a few days of treatment will improve control.

Insect Pest: Greasy cutworm 

Use 450 ml (500 ml)/ha in 250 L of water and apply in the evening as a directed spray to thoroughly cover the base of plants. Rain within a few days of treatment will improve control.

Using Decis Forte on Onions

Insect Pest: Thrips 

Use 360 ml (400 ml)/ha and apply in 500 - 600 L water/ha at the first sign of damage and repeat as necessary after 2 - 3 weeks. The addition of a non-ionic wetter is recommended.

Using Decis Forte on Orchard Crops

Insect Pest: Grass grub beetle 

For pre-flowering grapes, kiwifruit and tamarillos; non-bearing avocados, pipfruit and stonefruit; newly planted shelter provided not in flower.  Use 90 ml (100 ml) in 100 L/water and apply as a moderately fine spray ensuring complete foliage coverage.  Use at dusk commencing when beetles first appear, and repeat at 6 - 8 day intervals over the beetle feeding period.

Using Decis Forte on Pinus supp nursery seedling beds

Pests: Tomato fruit worm, Thrips

Use 36 ml (40 ml)/100 L water every 2 - 3 weeks from seedling emergence.

Using Decis Forte on Potatoes

Pest: Potato tuber moth 

Use 450 ml (500 ml) in 500 - 600 L water/ha and apply at first appearance every 10 - 14 days to control foliage mining activity. Maintain adequate soil moisture and soil cover over developing tubers.