丘陵地区山坑冷底稻田(广东俗称沤根田),由于终年积水或地下水位偏高,往往田土泞烂、有毒的硫化物等积累较多,水稻秧苗移植后回青、生长缓慢,根系易受毒害而产生黑根、甚至腐烂,从而降低禾苗对水肥、养分的吸收。禾苗长势差、抗逆性低,易受稻蓟马等害虫的为害及赤枯病的发生、蔓延。一般施用常规农药,可有效地控制虫害,但很难从根本上提高禾苗旺盛的生长活力,克服水稻生长后期的早衰、结实率差、产量低的弊病。而呋喃丹农药,不仅具有内吸、触杀及广谱性的杀虫作用,而且可直接刺激水稻根系的生长,促 In the hilly area, the mountain pit cold-bottomed paddy field (commonly known as 沤 rootland in Guangdong) often has muddy rots and toxic sulfide accumulations due to high annual hydrological or groundwater levels. After transplanting, the rice seedlings turn back to green and grow slowly. Poisoned to produce black roots, or even decay, thereby reducing the seedlings of water, fertilizer, nutrient absorption. Grasses grow worse, low resistance, vulnerable to pests such as rice thrips and the occurrence of the spread of the spread of the blight. It is hard to fundamentally improve the vigorous growth vigor of seedlings and overcome the shortcomings of premature aging, poor seed setting rate and low yield in late rice growth stage. Carbofuran pesticides, not only with internal absorption, contact and broad-spectrum insecticidal effect, but also directly stimulate rice root growth, promote