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
17 Jan 2024
Gonzalo Matamala, manager of Giddings Fruit, said that this variety is earlier than Santina and is characterised by a great hardiness. Furthermore, this variety is being developed for the Chinese market in order to cover the early and late part of the season.
23 May 2025
Exceptional frosts in April 2025 severely damaged sweet and sour cherry production in Turkey and Eastern Europe. With losses up to 90%, prices are set to rise sharply and supply will be limited. 2025 will be a critical year for producers, processors, and consumers alike.
12 Nov 2026
Rain, cold and low sunlight are complicating the cherry season in Chile. Walter Masman warns of risks to fruit quality and harvest. For Santina, further rain could cause losses of 15–20%: a hypothetical scenario that depends on weather forecasts over the next few weeks.
12 Nov 2026
Drosophila suzukii can infest healthy fruit, compromising quality and marketability. Timely treatments, monitoring, orchard sanitation and insecticide rotation help limit damage during harvest and reduce the risk of resistance. Learn when to start control measures.
