Early almond harvest as a strategy for sustainable irrigation, pest and disease management

Smith, Evie; Brown, Patrick H.; Andrews, Ellie M.; Shackel, Kenneth A.; Holtz, Brent A.; Rivers, Daniel J.; Haviland, David R.; Khalsa, Sat Darshan S.

doi:10.1016/j.scienta.2021.110651

Cited by 3 publications

(2 citation statements)

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“…The interest of deficit irrigation and its interaction with tree physiology and pests and diseases impact is also present in other parts of the world: Smith et al [55] have studied the positive effect that a combination of RDI and early harvest has on several pests and diseases in California almonds, thus improving the long-term sustainability of the crop and IPM programs. The two diseases most frequently observed in the orchard, S. carpophila (SB) and P. amygdalinum (RLB), did not present clear evidence of the effect of the irrigation treatment on their occurrence.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Deficit Water Irrigation in an Almond Orchard Can Reduce Pest Damage

et al. 2021

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Irrigated almond orchards in Spain are increasing in acreage, and it is pertinent to study the effect of deficit irrigation on the presence of pests, plant damage, and other arthropod communities. In an orchard examined from 2017 to 2020, arthropods and diseases were studied by visual sampling under two irrigation treatments (T1, control and T2, regulated deficit irrigation (RDI)). Univariate analysis showed no influence of irrigation on the aphid Hyalopterus amygdali (Blanchard) (Hemiptera: Aphididae) population and damage, but Tetranychus urticae Koch (Trombidiformes: Tetranychidae) damage on leaves was significantly less (50–60% reduction in damaged leaf area) in the T2 RDI treatment compared to the full irrigation T1 control in 2019 and 2020. Typhlocybinae (principal species Asymmetrasca decedens (Paoli) (Hemiptera: Cicadellidae)) population was also significantly lower under T2 RDI treatment. Chrysopidae and Phytoseiidae, important groups in the biological control of pests, were not affected by irrigation treatment. The most important diseases observed in the orchard were not, in general, affected by irrigation treatment. The multivariate principal response curves show significant differences between irrigation strategies in 2019 and 2020. In conclusion, irrigation schemes with restricted water use (such as T2 RDI) can help reduce the foliar damage of important pests and the abundance of other secondary pests in almond orchards.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%