In this 3-year study the suitability of the normalized differenced vegetation index (NDVI) to the evaluation of pea plant infestation by aphids and expected seeds yield was investigated. The effect was assessed in the conditions of the increasing doses of phosphorus fertilization (0, 70, and 140 kg P₂O₅ ha–¹) and in the different pea aphid (Acyrthosiphon pisum Harris) occurrence on six various cultivars of pea. Independent of the dose, the phosphorus fertilization supported the occurrence of aphids on pea plants of Batuta, Model, and Protecta cultivars where in Tarchalska and Mecenas cultivars only the standard dose (70 kg ha–¹) showed such effect. NDVI index was not clearly, unambiguously correlated to the intensity of A. pisum occurrence. Such factors as the deficiency or excessive amount of phosphorus, as well as meteorological conditions and the cultivar of host plant had the greater effect on its value than the presence of aphids. All this testifies that the NDVI index is not reliable indicator of aphid occurrence on pea, however it can offer a promising method to select the cultivars under sub-opitmal conditions. The seed yield was strongly related to agronomical factors (fertilization, cultivars) and plant (NDVI) variable, while marginally to environmental variable (aphids).

中文翻译：

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NDVI指数在不同磷肥施肥条件下对豌豆状况评价的适宜性

在这项为期 3 年的研究中，研究了归一化差异植被指数 (NDVI) 对豌豆受蚜虫侵扰和预期种子产量的评估的适用性。在增加磷肥剂量（0、70 和 140 kg P₂O₅ ha–¹）的条件下以及在不同豌豆蚜虫（Acyrthosiphon pisum Harris）发生在六个不同豌豆品种上的情况下评估了该效果。与剂量无关，磷肥支持在 Batuta、Model 和 Protecta 品种的豌豆植物上发生蚜虫，而在 Tarchalska 和 Mecenas 品种中，只有标准剂量（70 kg ha–¹）显示出这种效果。NDVI 指数与 A. pisum 发生的强度没有明确、明确的相关性。磷缺乏或过量等因素，以及气象条件和寄主植物品种对其价值的影响大于蚜虫的存在。这一切都证明NDVI指数并不是豌豆蚜虫发生的可靠指标，但它可以为在亚最佳条件下选择品种提供一种有前景的方法。种子产量与农艺因素（施肥、栽培品种）和植物（NDVI）变量密切相关，而与环境变量（蚜虫）关系不大。