New El Niño damage: bad weather favours new developments for Drosophila suzukii in Chile

10 Nov 2023
962

The presence of the El Niño phenomenon generated favourable climatic conditions for the development of Drosophila suzukii, a fly that threatens cherry orchards this season. The higher relative humidity resulting from a cooler and wetter spring, especially in central and southern regions, could favour an increase in the populations of this pest from the veraison phase, when the fruit is more susceptible to attack.

Despite the good climatic conditions for the spread of Drosophila suzukii, experts point out that growers have gained more knowledge about the pest in previous years, which enables them to control it more effectively and minimise risks. Although conditions are favourable, the experts believe that the worst is over and that it is now up to growers to keep the situation under control.

Despite the apparent improvement in weather conditions, experts emphasise the importance of monitoring and controlling the presence of Drosophila suzukii in orchards. Mass traps strategically placed in the orchard and surrounding areas, especially where fly host species are present, are recommended.

Surveillance and application of insecticides are essential, especially from the colour break, when cherry trees are most susceptible to this pest.

1) Ciclo di vita da uovo a adulto tra 8-18 giorni. 2) Tre le 10-15 generazioni l'anno. 3) Longevità tra 21-66 giorni. 4) Una femmina può deporre tra 400-600 uova. 5) Può deporre fino a 3 uova per frutto.

The experts also emphasise the need for adequate rotation of the active ingredients of the insecticides used, as Drosophila suzukii can develop resistance to the products. They also emphasise the importance of continuing research and development of biological tools such as repellents, chilli and garlic extracts, as well as fungal and bacterial products, to complement control strategies.

In conclusion, despite growers' experience, the presence of El Niño and current climatic conditions require constant vigilance and preventive measures to protect cherry orchards from the threat of Drosophila suzukii.

Source: Cerezos Chile

Images: Cerezos Chile


Cherry Times - All rights reserved

What to read next

The effect of seaweed extract on fruit set in cherries

Quality

24 May 2024

Sufficient pollination and successful fertilization are essential for fruit set and high yields. Polyamines and brassinosteroids - contained in kelp species like Ecklonia maxima - have been well documented to significantly promote both pollen germination and pollen tube growth.

Effects of netting in high-density sweet cherries on bird damage and Spotted Wing Drosophila

Covers

13 Mar 2025

In a two-year study, the nets reduced the damage caused by birds and SWD. Nets can be an effective way to protect crops and reduce dependence on pesticides.

In evidenza

Cherries and agrivoltaics: Swiss innovation combines energy and crop protection

Covers

20 Jun 2025

In Leuggern, a 1,300-panel agrivoltaic system is being built over a cherry orchard: shielding from hail, heat, and frost, dynamic light control, and 800 MWh annually. The “insolagrin” tech cuts pesticide use and enhances the resilience of field-grown cherry crops.

Early cherry varieties in Spain: ANA Chile® explores new promising genotypes

Varieties

20 Jun 2025

During the 2025 Technical Tour in Spain, ANA Chile® evaluated very early and low-chill cherry varieties, already present in Chile. Selections like the promising Selection 10 and Ibergen genotypes showed excellent quality, productivity, and commercial potential.

Tag Popolari