Bibliographic citations
Escalante, K., (2025). Compuestos orgánicos y biológicos en la promoción de resistencia contra Lasiodiplodia spp. y Phytophthora cinnamomi, en el palto variedad Hass bajo condiciones controladas [Tesis, Universidad Privada Antenor Orrego]. https://hdl.handle.net/20.500.12759/57271
Escalante, K., Compuestos orgánicos y biológicos en la promoción de resistencia contra Lasiodiplodia spp. y Phytophthora cinnamomi, en el palto variedad Hass bajo condiciones controladas [Tesis]. PE: Universidad Privada Antenor Orrego; 2025. https://hdl.handle.net/20.500.12759/57271
@misc{renati/1339747,
title = "Compuestos orgánicos y biológicos en la promoción de resistencia contra Lasiodiplodia spp. y Phytophthora cinnamomi, en el palto variedad Hass bajo condiciones controladas",
author = "Escalante Tenazoa, Karla Sofía",
publisher = "Universidad Privada Antenor Orrego",
year = "2025"
}
With the purpose of determining the impact of six organic and biological products in promoting systemic resistance against the fungus Lasiodiplodia spp. and the Oomycete Phytophthora cinnamomi in avocado cultivation, an experimental study was carried out in the shed facilities of the Antenor Orrego Private University (UPAO), using avocado seedlings (Persea Americana Mill) of the Hass variety grafted onto Zutano. For this purpose, the following products with their respective concentration were applied to the soil 3 times with an interval of one month between each application: Timorex Gold (0.40%), Cropfield Sulpenta 27 (0.25%), Biodyne 401 (1%), Trich 69 (0.20%), Phytoimmunol (0.70%), Regalia Maxx (0.35%). After the last application, inoculation with the aforementioned pathogens was carried out. The evaluation of the damage caused by Lasiodiplodia theobromae was done considering three parameters: length of the lesion, degree of vascular damage and systemic colonization. The evaluation of the damage of Phytophthora cinnamomi was carried out using a scale of degrees that includes from asymptomatic plant to dead plant. This evaluation was carried out every 7 days after P. cinnamomi inoculation. The results, according to the length of the lesion produced by Lasiodiplodia theobromae, indicate that the shortest length of external damage was found in seedlings treated with Timorex Gold, with a difference of only 1 mm with respect to the seedlings treated with Biodyne and Regalia Maxx. Regarding the degree of vascular damage produced by L. theobromae, the lowest (2.25) was observed in seedlings treated with Timorex Gold, Cropfield Sulpenta 27 and Biodyne, however, this parameter in no way explains or expresses the level of severity of systemic infection that the seedling shows. Finally, in the evaluation of the level of systemic colonization of L. theobromae, it was found that the seedlings treated with Timorex Gold and Cropfield Sulpenta 27 XII have generated acquired systemic resistance in the plant since the advance of the mycelium was stopped by phenolic substances or phytoalexins. formed in the plant in response to the induction generated by these products. The results, according to the degree of damage produced by P. cinnamomi, show that the lowest degree (1.00) was observed in the seedlings treated with Cropfield Sulpenta 27 and Biodyne. It was possible to verify that the state of wilting originally observed did not necessarily lead to the death of the seedling. Therefore, it was necessary to reevaluate the severity beyond 30 days after this test was performed.
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