福岡県農業総合試験場研究報告14(1995) pp 171 - 173
雨よけ栽培によるブドウ枝膨病の耕種的防除
梶谷裕二・山中正博・山田健一
ブドウ‘巨峰’の難防除病害である枝膨病に対して,雨よけ栽培による耕種的防除の効果について検討した。
1. 3月下旬から7月下旬までの間,塩化ビニル資材で被覆することで,被覆期間中に殺菌剤散布を行わなくても,本病による新梢基部の黒色病斑の発生をほぼ防止できた 。特に梅雨明けが早い年には6月下旬までの被覆でも高い発病防止効果が認められた。
2. 6月下旬までにビニル被覆を除去すれば,巨峰果実の着色不良や糖度低下等の品質低下は認められない。
3.本病に対して雨よけ栽培と被覆除去後の薬剤防除を組み合わせた総合防除区では,栽培期間中の殺菌剤の散布回数を,被覆をしない慣行防除区の1/3〜1/5に減 少させても高い防除効果が認められた。
[キーワード:ブドウ枝膨病,雨よけ栽培,耕種的防除,総合防除,果実品質]
Cultural Control of Grapevine Swelling Arm Disease with the Rain Shelter. KAJITANI Yuuji, Masahiro YAMANAKA and Ken-ichi YAMADA (Fukuoka Agric. Res. Cent. , Chikushino, Fukuoka 818, Japan) Bull. Fukuoka Agic. Res. Cent. 14 : 171-173 (1995)
1. The black spot lesion on the bottom of grapevine young shoot, a typical symptom of Grapevine Swelling Arm disease, was effectively controlled using the rain shelter with which covered the grapevine from the end of the March to the end of July. When the rainy season ceases earlier, the disease was controlled even with covering to the end of June. 2. No effect of rain shelter was found on the quality of grapevine such as coloring and sugar content until the end of June. 3. In the integrated control program with fungicide application following the rain shelter, frequency of fungicide application was reduced to one third or one fifth, compared with conventional control of grapevine culture in a open field.
[Key words : Grapevine swelling arm disease, Rain Shelter, Cultural control, Integrated control, Fruit quality]
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