McPhie Douglas, Burrack Hannah J
Department of Entomology, North Carolina State University, Raleigh, NC, USA.
Corresponding author.
J Econ Entomol. 2017 Feb 1;110(1):208-212. doi: 10.1093/jee/tow266.
Female strawberry bud weevils (Anthonomus signatus Say) oviposit in developing flower buds of strawberries (Fragaria spp.), caneberries (Rubus spp.), and red bud (Cercis canadensis). After laying a single egg, weevils will girdle or "clip" the buds at the pedicel, killing the bud and preventing fruit development. This injury is of concern to commercial strawberry growers, who typically assume the loss of one clipped bud is the loss of one average sized fruit, causing the economic threshold to be set extremely low. There is evidence of compensation in some cultivars of strawberries, but research has previously only been conducted in perennial strawberry production. The majority of strawberries in the southeastern United States are grown in annual plasticulture systems. We assessed the ability of five strawberry cultivars commonly grown in annual plasticulture to compensate for A. signatus injury by removing buds at different growth stages. There was no effect of bud removal on total yield in any of the cultivars tested. Harvest timing was affected by simulated A. signatus damage in some cultivars, which may be an important consideration for direct market strawberry growers.
雌性草莓芽象甲（Anthonomus signatus Say）在草莓（Fragaria spp.）、树莓（Rubus spp.）和紫荆（Cercis canadensis）的发育花芽中产卵。产下一枚卵后，象甲会在花梗处环割或“剪断”芽，致使芽死亡并阻止果实发育。这种损害令商业草莓种植者担忧，他们通常认为一个被剪断的芽损失就等同于一个平均大小果实的损失，从而将经济阈值设定得极低。有证据表明某些草莓品种存在补偿现象，但此前的研究仅在多年生草莓生产中进行。美国东南部的大多数草莓是在一年生塑料大棚栽培系统中种植的。我们评估了一年生塑料大棚栽培中常见的五个草莓品种通过在不同生长阶段去除芽来补偿象甲损害的能力。在所测试的任何品种中，去除芽对总产量均无影响。在一些品种中，收获时间受模拟象甲损害的影响，这对于直接面向市场的草莓种植者而言可能是一个重要的考虑因素。
