Influence of growing location and cultivar on Rhyzopertha dominica (Coleoptera: Bostrichidae) and Sitophilus oryzae (Coleoptera: Curculionidae) infestation of rough rice

FRANK H. ARTHUR; RUSTY C. BAUTISTA; TERRENCE J. SIEBENMORGEN

摘要

Long-grain rice cultivars Cocodrie, Wells, and XP 723 grown in three locations (Hazen, MO; Essex and Newport, AR, USA), and medium-grain rice cultivars Bengal and XP 713 grown in two locations (Jonesboro and Lodge Corner, AR, USA), were harvested and assayed for susceptibility to Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae), the lesser grain borer, and Sitophilus oryzae (L.) (Coleoptera: Curculionidae), the rice weevil, on rice held at 27℃ 57% and 75% relative humidity (RH).Separate samples from the same harvest lots were also analyzed for the physical characteristics of brown rice yield, percentage whole kernels and kernel thickness. Progeny production and feeding damage of R. dominica were significantly different among long-grain cultivars within two of the three locations (P ＜ 0.05), but not for location or RH (P ≥ 0.05), while progeny production of S. oryzae was different among cultivars, location, and RH (P ＜ 0.05). On medium-grain rice, both cultivar and location were significant for progeny production of R. dominica, but not RH, while cultivar and RH were significant for progeny production of S. oryzae, but not location. On both rice types, feeding damage of R. dominica followed the same trends and was always strongly positively correlated with progeny production (P ＜ 0.05), but for S. oryzae there were several instances in which progeny production was not correlated with feeding damage (P ≥ 0.05). Physical characteristics of both rice types were statistically significant (P ＜ 0.01) but actual numerical differences were extremely small, and were generally not correlated with progeny production of either species. Results indicate that the location in which a particular rice cultivar is grown, along with its characteristics, could affect susceptibility of the rice to R. dominica and S. oryzae.

机译：长粒水稻品种Cocodrie，Wells和XP 723分布在三个地方（密苏里州哈岑;美国艾塞克斯和纽波特），中粒水稻品种孟加拉和XP 713分布在两个地方（Jonesboro和Lodge Corner，收获并在存放于大米中的稻米中测定对小bore虫的Rhyzopertha dominica（F.）（Coleoptera：Bostrichidae）和米象鼻虫Sitophilus oryzae（L.）（Coleoptera：Curculionidae）的敏感性。在27℃相对湿度（RH）为57％和75％的情况下。还分析了相同收获批次的不同样品的糙米收率，整个籽粒百分比和籽粒厚度的物理特征。在三个位置中的两个位置上，长粒品种的多米罗非鱼的子代产量和摄食损害显着不同（P ＜0.05），但对于位置或相对湿度（P≥0.05）则没有差异，而米根的子代产量则不同。品种，位置和相对湿度之间的差异（P ＜0.05）。在中粒水稻上，栽培品种和位置对于多米尼加罗非鱼的子代生产均很重要，而对RH则不重要，而栽培品种和RH对米曲霉的子代生产均很重要，但对地点均不重要。在两种水稻上，多米尼加罗非鱼的摄食损害都遵循相同的趋势，并且始终与子代产量呈极显着正相关（P ＜0.05），但是对于米曲霉，在一些情况下，子代产量与摄食伤害没有关联（ P≥0.05）。两种水稻的物理特性均具有统计学意义（P ＜0.01），但实际数值差异极小，并且通常与这两种水稻的后代产量均不相关。结果表明，特定水稻品种的生长地点及其特性可能会影响水稻对多米尼加和米曲霉的敏感性。

Influence of growing location and cultivar on Rhyzopertha dominica (Coleoptera: Bostrichidae) and Sitophilus oryzae (Coleoptera: Curculionidae) infestation of rough rice

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