In third decade of April, there was one clear trend towards lower temperatures compared to the seasonal norm. Despite the transition from almost summer conditions, with temperatures close to 30°C, no significant problems were found for the olive trees, if not a slight slowdown in vegetative activity. In areas where the inflorescences were already well developed, there were some concerns, but fortunately, temperatures did not fall below 2°-3°C, a critical threshold beyond which harmful effects could occur.
With theimminent forecast of an increase in temperatures next week, it is important to consider how this may affect the situation with a return to conditions of normality e accelerate vegetative activity again. For this reason, it is essential to monitor the transition: therefore, as we prepare for an increase in temperatures, it is essential to maintain constant surveillance on the health and development of olive trees. Starting from parasite attacks.
Olive margaronia – We already have larvae in the early stages of development: if intervention is required, it is recommended to use Bacillus thuringiensis kurstaki SA12, a bacterium that acts effectively against larvae. It is important to carefully follow the instructions on the label, repeat the operation respecting the instructions on the label.
Olive moth – Lower temperatures may have reduced the moth's activity and mobility, causing a decrease in captures in monitoring devices. However, it is important to continue to monitor the situation carefully and take appropriate control measures as soon as climatic conditions become more favorable for its activity. It is advisable to pay attention to any changes in climatic conditions that could favor a rapid resumption of activity, also because the flowering phase of the olive tree is approaching.
Olive fly – Few catches were detected, the activity of the adults was probably reduced by the lowering of temperatures.
Olive leaf midge – No adult emergence holes have yet been noticed. Olive leaf midge causes damage due to the presence of its larvae which cause the formation of galls on the olive leaves.
Cochineal half peppercorn – The current situation indicates that only about 2-4% of the eggs have hatched. Given this low percentage, no phytosanitary intervention is currently necessary. However, it remains important to continue to monitor the situation carefully.
AIPO Director
Italian Association
Olive producers
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