Wide Skope of application and moderate on beneficials

THE IMPACT of insecticides on beneficial insects is of major importance in cotton production. It has a large bearing on product choice and timing of application.

Skope® insecticide from Adama, was launched during the 2016 cotton season to control bollworms, mirids, aphids, silverleaf white fly and green vegetable bug, offering a wide application window. Skope provides great value for both conventional and GM cotton growers, controlling a wider spectrum of pests than any other registered insecticide.

Because Skope contains Acetamiprid (Group 4A), it has previously been regarded as having a high impact on beneficial insects.

To broaden the information available on the impact of Skope on beneficial arthropods, Adama has invested significant resources in a set of large-scale field trials during the 2017/18 season at Griffith, Narromine and Bundaberg.

The trials investigated the impact of Skope on the main beneficial insects in cotton compared with many commonly used products.

The results showed that Skope was among the insecticides with the least impact on beneficial insects.

Adama’s NSW market development manager, Harry Pickering who led the project of Skope beneficial evaluation said: “In trials with lady beetles, and red and blue beetles, Skope applied at the highest rate (350mL/ha) showed only a slight affect on beetle numbers three days after the treatment, similar to Regent insecticide. However, at seven and 14 days after treatment, beetle numbers recovered and at times exceeded pre-treatment levels, similar to those of Transform and Starkle.”

At the large-scale evaluation near Griffith, spider numbers remained stable for five weeks following treatment before rising steadily through to eight weeks, when monitoring concluded. These results were also similar to those in adjacent fields treated with Starkle and Transform insecticides, which are recognised as having low impact on spiders.

For further information on Skope contact your local Adama representative.

(This article featured in the November 2018 Edition of Rural Business Magazine)