New green peach aphid strain worries growers

The agricultural landscape is no stranger to challenges, but the emergence of a new Myzus persicae strain has growers and industry professionals rethinking their approach. The new strain of green peach aphid is causing widespread concern due to its increased resistance to treatments and accelerated development rate. As this strain continues to spread, the market is beginning to respond, but awareness and preparedness levels vary significantly.

A surprising discovery
When the new Myzus strain first appeared, it caught many growers by surprise. "Growers were using their usual treatments and defense protocols for Myzus, only to realize they weren't working as effectively anymore," says Francesco Bourlot, Category Product Manager. This was particularly evident with chemical treatments, such as flonicamid, which had been reliable in the past but suddenly offered little to no control over the infestations.

The situation became even more alarming as growers observed the strain's ability to develop faster and colonize crops more aggressively than its predecessor. For greenhouse crops such as peppers, eggplants, cucumbers, and a range of ornamentals—many of which are core crops in several regions—this new strain represents a significant threat.

Francesco Bourlot

Shifting strategies
In response, many producers initially tried increasing the dosage or frequency of chemical applications. However, this approach yielded minimal results, prompting a necessary shift toward more sustainable methods.

For growers already utilizing beneficial insects, new strategies include adapting their protocols—either by increasing dosages or introducing newly developed beneficials from R&D. Species such as Aphidius matricariae (Aphipar-M) have shown promise in helping growers manage the new strain effectively. "I would stress the fact that preventive application of beneficials allows the best and most cost-effective control of the pest," emphasizes Bourlot. These shifting strategies underscore the increasing importance of biological solutions as part of an integrated pest management strategy.

Awareness gaps across markets
Despite the strain's rapid spread, market awareness remains inconsistent. In countries like the Netherlands—where the strain was first identified—there's relatively high recognition of the issue. However, in other regions, growers are only just beginning to adapt.

"Many farmers have noticed unusual issues in their crops but didn't understand the underlying cause," explains Bourlot. Samples collected and analyzed often revealed the presence of the new strain, but awareness and education efforts still need to catch up in many areas.

The emergence of Myzus 2.0 serves as a reminder of the dynamic nature of pest control and the importance of proactive measures. To combat this strain effectively, growers need support in two key areas: comprehensive education on the new strain and access to effective integrated pest management strategies.