article · Biologica Nyssana
The research aimed to test whether foliar sugar sprays are effective in promoting Anna apple tree resistance to the codling moth (Cydia pomonella L.), a key pest in Algeria. The sucrose, fructose, and blend mixture (100 ppm) treatments at low concentrations were evaluated in an experiment conducted in Batna from 2017 to 2019. Treatments were applied 21 days apart, starting after flowering and continuing until harvest, to stimulate trees’ innate immunity through “sugar immunity.” Results indicated a significant reduction in infestation levels, from 42.62% to 12.24%, with sucrose alone being the most efficient (11.57%–14.91%). Reductions were also obtained with fructose and the mixture. Infestation levels were lower in 2018 and 2019 compared to 2017, which is attributed to climatic factors. The study emphasizes the effects of climate change on pest ecology and encourages the use of sugar-induced immunity rather than chemical insecticides, recognizing the need to carefully manage application times and dosages amid global warming challenges.
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DOI: 10.46793/biolnyss.16.2.2z
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