木薯器官及其混合物水浸提液对橡胶树棒孢霉落叶病病菌的化感作用  被引量:5

Allelopathy of Water Extracts From Cassava Organs and Their Mixtures to Corynespora cassiicola of Hevea brasiliensis

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作  者:刘培培 刘子凡 刘乔颖 甘冰 LIU Peipei, LIU Zifan, LIU Qiaoying, GAN Bing(Institute of Tropical Agriculture and Forestry, Hainan University, Haikou, Hainan 570228, Chin)

机构地区:[1]海南大学热带农林学院,海南海口570228

出  处:《热带作物学报》2018年第2期338-342,共5页Chinese Journal of Tropical Crops

基  金:国家自然科学基金(No.31560374)

摘  要:采用生长速率法探讨不同浓度木薯器官及其混合物水浸提液于不同处理天数对橡胶树棒孢霉落叶病病菌的化感作用。结果表明:(1)根、叶水浸提液表现为化感抑制效果,浓度越大,效果越明显。(2)茎水浸提液在浓度为10~100 mg/mL时无明显化感效果;浓度达1 000 mg/mL时,处理后3~7 d时表现为显著的化感促进效果。(3)根、茎、叶比例为4:2:1的混合物水浸提液在10~100 mg/mL浓度时无明显化感效果,当浓度达1 000 mg/mL时,在处理后4~6 d表现为化感抑制效果。(4)茎、叶比例为2:1的混合物水浸提液在10 mg/mL浓度时化感效果不明显;当浓度达到100 mg/mL时,处理后2 d表现为显著的化感抑制效果,处理后3~6 d化感效果不明显;浓度达到1 000 mg/mL时,处理后2~3 d无明显的化感效果,处理后4~6 d则呈现显著的化感促进效果。建议间作木薯的胶园收获木薯后,应及早将茎干移出胶园,以减少橡胶树棒孢霉落叶病的发生。There is a controversy for whether intercropping cassava will result in occurrence of the corynespora leaf fall disease of Hevea brasiliensis in academic circles. Allelopathy can affect the plant disease occurrence to a certain extent. Used the growth rate method, the allelopathy of water extracts from cassava organs and the mixtures on the disease at different concentrations and different days were studied. The results showed that: (1) Water extracts from the root and leaf of cassava could inhibit the growth of Corynespora cassiicola of H. brosiliensis, and the allelopathy inhibiting effect was more obvious with the concentration increased. (2)The allelopathy effect to water extracts from the stem was not obvious between 10~100 mg/mL, while there was a significantly positive effect at 1 000 mg/mL until 3-7 days. (3)The effect of water extracts from the mixed organs in the ratio of the root, stem and leaf of cassava 4:2:1 was not noticeable between 10-100 mg/mL, while the inhibiting effect was significant at 1 000 mg/mL until 4-6 days. (4)The allelopathy effect of water extracts from the mixed organs in the ratio of the stem and leaf 2:1 was not obvious at 10mg/mL, while at 100 mg/mL the inhibiting effect was significant after 2 days, but it was not obvious until 3-6 days. And then the concentrations increased to 1 000 mg/mL, the effect was not obvious until 2-3 days, the positive effect was significant until 4-6 days. In order to reduce the occurrence of corynespora leaf fall disease, removing the stems of cassava should be removed from the rubber plantation as soon as possible after harvesting.

关 键 词:木薯 水浸提液 橡胶棒孢霉落叶病病菌 化感作用 

分 类 号:S435.33[农业科学—农业昆虫与害虫防治]

 

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