海南岛南药根结线虫种类鉴定

运用比较形态学、同工酶和mtDNA-PCR对采自海南岛9个市县的南药根结线虫进行种类鉴定,结果发现有南方根结线虫、象耳豆根结线虫、爪哇根结线虫、花生根结线虫和西班牙根结线虫等5种根结线虫危害海南岛南药。5种根结线虫均能在海巴戟上寄生与危害,而南方根结线虫寄主非常广泛,可危害大多数调查的药用植物。

Species identification of the root-knot nematode on southern herbs in Hainan Province

In order to take effective control on Meloidogyne incognita (Kofoid & White) Chitwood, and to optimize cultivation conditions of greenhouse tomato, the effect of corn straw (8.32, 4.16, 2.08 g/kg), pepper straw (4.16, 2.08, 1.04 g/kg) and Artemisia capillaris straw (4.16, 2.08, 1.04 g/kg) on tomato and M. incognita was investigated in this study. The results showed that different treatments had different effect on tomato at seedling stage (30 days), the corn straw (4.16, 2.08 g/kg) had significant influence on plant height, the pepper straw (4.16, 1.04 g/kg) and A. capillaris straw (4.16, 2.08 g/kg) had significant influence on stem diameter. Tomato grew better than the control group 60 days after treated with A. capillaris straw. Morphological parameter varied as stem diameter > flowering > branch. Stem diameter, branch and fruit parameters of the treated tomato were much higher than those of the control plants 120 days after treatment. The rank order of the control effect against M. incognita was: A. capillaris stalk> pepper stalk> corn stalk, with the efficacy of 79.60%, 71.32% and 68.89%, respectively. It was indicated that A. capillaris stalk had the best effect to improve tomato yield and control M. incognita.