Steinernema longicaudum BPS品系线虫防治花生田蛴螬施用技术

Application Technology of Steinernema longicaudum BPS Strain in Peanut Fields for Chafer Grub Control

为证实BPS线虫田间防治害虫的潜能和花生安全生产的可能性,进行了长尾斯氏Steinernema longicaudum BPS品系线虫防治花生田蛴螬效果及其施用技术研究。结果显示:在8个处理剂量中,以5000IJs/穴的剂量田间效果最好,花生荚果受害率(3.1%)显著低于40%甲基异柳磷对照的(9.0%)和清水对照的荚果受害率(53.2%),蛴螬减退率(95.7%)和平均产量(5941.5kg/hm2)也与40%甲基异柳磷对照的(82.7%,303.8kg)有显著差异(P<0.05);灌施效果显著好于喷施;在5000IJs/穴的剂量下,混合喷施BPS线虫和小杆线虫(4500∶500),未表现出相克、协同或加性效应。研究结果表明BPS线虫作为生物防治制剂防治花生田蛴螬具有防虫、增产双重效果。

A peanut field trial on application techonlogy ofSteinernema longicaudum BPS for chafer grub control had been conducted to attest the potential of nematode BPS using for pest control in crop fields, and to see the possibility of peanut pesticide free production. The result showed that the dosage of 5000 IJs/plant was the best one among the 8 dosages, the average of injured legume（3.1%） with BPS was significant lower than that of 40% isofenphos-methyl solution（9.0%） and than that of tap water（53.2%）. The rate of grub decrease（95.7%） and the dry weight of peanut（5941.5 kg/ha） with BPS were significant different（P〈0.05）to that of with 40% isofenphos-methyl solution（82.7%, 303.8 kg）. The application of BPS was better with irrigation than with spray. At the dosage of 5000 IJs/plant, the combination of BPS and Rhabditis sp.（4500：500） did not show conflictive, coordinate or synergistic effect to grub control. The results indicated that nematode BPS as a bio-control agent has both effects of chafer grub control and peanut yield increase.