@article{oai:ir.kagoshima-u.ac.jp:00016065, author = {赤木, 功 and AKAGI, Isao and 福丸, 瑛里紗 and FUKUMARU, Erisa and 樗木, 直也 and CHISHAKI, Naoya}, journal = {鹿児島大学農学部農場研究報告, Bulletin of the Experimental Farm Faculty of Agriculture,Kagoshima University}, month = {Mar}, note = {我が国のオクラ栽培において,ネコブセンチュウによる被害が大きな問題となっている.本研究では,ネコブセンチュウ密度の異なる土壌でオクラを栽培し,その生育経過および果実収量を調査することで,ネコブセンチュウの初期密度とオクラの生育および果実収量との関係性について解析を試みた.オクラの草丈は初期密度が高い試験区ほど低下する傾向にあった.草丈について対照区(初期密度: 0 頭/20 g)に対する相対値で示すと,レベルI 区(初期密度:6.3頭/20 g),レベルII 区(初期密度:45.6頭/20 g)およびレベルIII 区(初期密度:476頭/20 g) の順にそれぞれ84.8~89.9%,72.5~79.0%および75.6~78.1%であった.また,オクラ果実の累積収量も同様の傾向にありった.対照区に対する相対値はレベルI,II およびIII 区の順にそれぞれ50.3~76.4%,42.2~64.7% および20.4~42.5% であり,初期密度(対数値)と累積収量の間には明瞭な負の相関が認められた.このことは,ネコブセンチュウの初期密度はオクラの果実収量の減収程度を予測する上での有効な指標となることを示唆している., Damage on okra (Abelmoschus esculentus (L.) Moench) caused by root-knot nematodes (Meloidogynespp.) infection is a serious problem in Japan. In order to clarify the relationship between initial population density of root-knot nematodes and the degree of damage to growth and fruit yield of okra, we cultivated okra on soils with different levels of population density of root-knot nematodes and investigated its growth parameters and fruit yields. It was shown that the plant heights decreased with increase in levels of population density of root-knot nematodes. The relative values of plant heights to control plot (initial population density: 0 numbers/20 g soil) were 84.8–89.9%, 72.5–79.0%, and 75.6–78.1 % in the level I plot (6.3 numbers/20 g soil), level II plot (45.6 numbers/20 g soil), and level III plot (476 numbers/20 g soil), respectively. Moreover, the cumulative yields of okra fruits had the same tendency. The relative values of cumulative yield to control plot were 50.3–76.4%, 42.2–64.7%, and 20.4–42.5%, respectively. The cumulative yields were negatively correlated with the logarithmic values of cumulative yields, which suggested that the initial population density of root-knot nematodes can be an effective index for calculating the degree of decrease in fruits yields of okra.}, pages = {1--6}, title = {ネコブセンチュウの初期密度がオクラの生育および収量に及ぼす影響}, volume = {42}, year = {2021}, yomi = {アカギ, イサオ and フクマル, エリサ and チシャキ, ナオヤ} }