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50％排草丹(苯达松)1987年引进我场,当年试验示范面积达1.5万亩,占播种面积的57.7%,控制了多年来麦田优势种杂草猪殃殃的为害。 一、猪殃殃发生情况 猪殃殃是江汉平原以北与鄂西北之交的水旱麦田最重要杂草,在我厂常年发生面积达2.5万亩,占播种面积的96.1%。猪殃殃一般为10月下旬萌发出苗,11月中旬至翌年4月上旬为分枝期,冬季匍匐地面,春上生育迅速,夏初攀援麦子茎秆、麦叶,影响麦子光合作用。据1986—1987年调查,每平方尺有猪殃殃58—105株,多的达208株,是小麦基本苗的1.9—6.8倍。1株猪殃殃有5—9个主枝,46—87个侧枝,覆盖面积1—3.5平方尺,与麦苗共生,争夺水肥养分。猪殃
50% of rowdy dan (bentazone) was introduced into our farm in 1987, when the experimental demonstration area reached 15,000 mu, accounting for 57.7% of the sown area, controlling the damage of the weeds in the wheat field over the years. First, the occurrence of pig apologize Pig apologism is the most important weed in the water and dry wheat fields north of the Jianghan Plain and northwestern Hubei, perennial occurred in our plant area of 25000 acres, accounting for 96.1% of the sown area. Galium aparine germination usually occurs in late October, mid-November to early April the following year for the branching period, the winter creeping ground, rapid fertility in spring, early summer climbing wheat stalks, wheat leaves, affecting wheat photosynthesis. According to the survey of 1986-1987, there were 58-105 pigs per square foot, more than 208 strains, which was 1.9-6.8 times of that of wheat. A strain of Galium aura has 5-9 main branches, 46-87 collateral, covering an area of 1-3.5 square feet, and wheat seedlings symbiotic, for water and fertilizer nutrients. Pig calamus