Abstract

수수 재배시 생산비 절감을 위해 몇몇 약제에 대해 약효 및 약해를 검토한 결과 다음과 같은 결과를 얻었다. 수수에 적용이 가능한 제초제로는 약해로 보면, 메타벤즈티아주론(수)은 약해정도가 기준량에서 1, 배량에서 3 정도로 수량에 미치는 영향이 적었다. 그러나 시마진(수)는 기준량에서 2, 배량에서 4로 다소 약해 정도가 높았다. 옥사디아길(유)과 디메테나미드-피 +펜디메탈린(유)는 수수에는 약해가 기준량에서는 1, 배량에서는 3 정도이었으나 잡초방제 효과는 낮았다. 예천과 밀양 2개 지역에서 수량은 메타벤즈티아주론과 시마진 약제에서 각각 <TEX>$314kg\;10a^{-1}$</TEX>과 <TEX>$284kg\;10a^{-1}$</TEX>로 손제초구 <TEX>$321kg\;10a^{-1}$</TEX>, <TEX>$336kg\;10a^{-1}$</TEX>로 손제초구와 유의적인 차이가 없었다. 한편, 잡초방제효과는 메타벤즈티아주론(수)는 예천, 밀양 2개 지역에서 각각 95%, 81%로 수수에 적용이 가능한 수준이었다. 그러나 시마진(수)은 2개지역 모두 84%, 79% 이었으며, 옥사디아길(유)과 디메테나미드-피 +펜디메탈린(유)의 방제가는 각각 32%, 68%로 낮았다. Herbicide options for weed control in sorghum is very limited, hence there is a need for exploring potential herbicides. Sorghum herbicide tolerance field trails were conducted at two locations, Yaechoun, Gyeongsangbuk-do, and Miryang, Gyeongsangnam-do, in 2013. Tolerance of sorghum was evaluated following the pre-emergence application of methabenzthiazuron 70% (WP), simazine 50% (WP), oxadiargyl 1.7% (EC), and dimethenamid-P 5% + pendimethalin 20% (EC) at the standard rate 157.5 g, 75 g, 5.1 g, and 75 g a.i. <TEX>$10a^{-1}$</TEX>, respectively. As well as double the standard rate. On a phytotoxicity scale of 0 to 9, methabenzthiazuron (WP) induced injury to sorghum up to level 1 at the standard rate and to 3 at double the rate, but did not significantly affect the yield any statistical difference from the untreated. Simazine (WP) induced phytotoxicity up to levels 2 and 4 at single and double rates, respectively. Simazine (WP) did not significantly affect yield: however, the values were numerically lower than those in the methabenzthiazuron (WP) treatment. Oxidiargyl (EC) and dimethenamid + pendimethalin (EC) induced no or slight phytotoxicity; however they failed to provide effective weed control at the standard rate (32 and 68% control, respectively). Out of the tested, methabenzthiazuron (WP) was found to have potential for use in sorghum whereas the other herbicides caused unacceptable levels of injury.

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