| Abstrakt: |
The green peach aphid, Myzus persicae Sulzer (Sulzer 1776) (Hemiptera: Aphididae), is one of the most significant agricultural pests worldwide due to its wide host range and considerable impact on crop productivity. Among its hosts is sweet potato (Ipomoea batatas L.), a widely cultivated tuber crop recognized for its high nutritional relevance and low production costs. Furthermore, sweet potato plays a crucial role in food security and has attracted industrial interest due to its versatility and productivity. This study aimed to identify sweet potato cultivars tolerant to aphid attacks, providing an alternative strategy for integrated pest management. Seven commercial cultivars were evaluated (‘Beauregard,’ ‘INIA Arapey,’ ‘IAPAR 69,’ ‘BRS Amélia,’ ‘SCS367 Favorita,’ ‘SCS370 Luiza,’ and ‘SCS372 Marina’), focusing on the genetic effects on the biology and host-choice behavior of M. persicae, along with quantifying leaf trichome density. The results demonstrated that although the aphid was able to complete its development in all evaluated genotypes, the cultivar ‘SCS370 Luiza’ exhibited a high trichome density, which extended the aphid’s lifecycle, reduced its fecundity, and exhibited lower feeding preference by the insect. These findings suggest that the resistance observed in ‘SCS370 Luiza’ is linked to antibiosis and antixenosis mechanisms, emphasizing its importance for integrated pest management strategies and sweet potato breeding programs. [ABSTRACT FROM AUTHOR] |
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