During coffee harvest, picked berries fall to the ground where they serve as a reservoir for the coffee berry borer (CBB) which then infest coffee berries on the trees. This study tested the effect of fallen CBB-infested coffee berries on the infestation of coffee trees (Coffea arabica). Three-year-old trees were treated with either 0, 1, 5, 10, 15, or 20 CBB-infested berries placed on the root vicinity. The CBB infestation of coffee trees was sampled every 30 days during 6 months for four coffee productive cycles. The experiment was set up at four different locations comprising different altitudes (1,218; 1,381; 1,470; and 1,700 m.a.s.l.) and the measurements were taken during 4 years where the climatic events of El Niño, La Niña, Neutral, and transitions El Niño/La Niña were present. The results show that CBB-infested berries left on the ground are a reservoir of CBB for 140 ± 8.2 days and infest developing healthy coffee berries. In a climate Neutral year, one CBB-infested ground berry left on the ground infested on average 590.2 ± 142.2 berries in coffee trees grown at 1,218 m.a.s.l. At the same altitude, one CBB-infested ground berry resulted in 151.5 ± 29.1 infested tree berries during La Niña year and 959.0 ± 89.6 during El Niño year. The CBB infestation was positively correlated with temperature and negatively correlated with altitude (R²= 0.99 and R²= −0.96, respectively). This study highlights the importance of careful harvesting practices to prevent berries from falling to the ground, followed by ground sanitation to limit later infestation of the coffee crop.

在咖啡收获期间，采摘的浆果掉在地上，作为咖啡浆果蛀虫 (CBB) 的蓄水池，然后在树上侵染咖啡浆果。这项研究测试了倒下的受 CBB 感染的咖啡浆果对咖啡树（小粒咖啡）感染的影响）。用放置在根附近的 0、1、5、10、15 或 20 个 CBB 感染的浆果处理三岁的树。在四个咖啡生产周期的 6 个月内，每 30 天对咖啡树的 CBB 侵染进行采样。实验设置在四个不同的地点，包括不同的海拔高度（1,218；1,381；1,470；和 1,700 masl），测量是在 4 年期间进行的，其中厄尔尼诺、拉尼娜、中性和厄尔尼诺/拉尼娜在场。结果表明，留在地上的受 CBB 侵染的浆果是 CBB 的储存库，可保存 140 ± 8.2 天，并侵染正在发育的健康咖啡浆果。在气候中性年份，一个受 CBB 侵染的地面浆果留在地面上，平均 590.2 ± 142.2 个浆果在种植于 1,218 masl 的咖啡树中 在同一海拔，在拉尼娜年和厄尔尼诺年，1 个受 CBB 侵染的磨碎浆果导致 151.5 ± 29.1 个受侵染的树浆果和 959.0 ± 89.6 个。CBB侵染与温度呈正相关，与海拔呈负相关（R ² = 0.99 和R ² = -0.96，分别）。这项研究强调了谨慎采摘做法的重要性，以防止浆果掉到地上，其次是地面卫生以限制咖啡作物的后期侵染。