Effects of <i>Meloidogyne incognita</i> on Growth of Grafting Wax Gourd for Different Rootstocks
Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (1): 135-140.DOI: 10.3969/j.issn.1000-2561.2020.01.019

• Crop Pests, Diseases and Their Control, Environmental Protection • Previous Articles     Next Articles

Effects of Meloidogyne incognita on Growth of Grafting Wax Gourd for Different Rootstocks

HAN Yingguang1,LONG Haibo3,LIAO Daolong2,4,*(),YUN Tianhai2,4,HU Yanping2,4   

  1. 1. Hainan Province Wenchang Agricultural Technology Extension Service Center, Wenchang, Hainan 571300, China
    2. Institute of Vegetables, Hainan Academy of Agricultural Sciences, Haikou, Hainan 571100, China
    3. Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, Hainan 571101, China
    4. Hainan Province Key Laboratory of Vegetable Biology, Haikou, Hainan 571100, China
  • Received:2019-03-26 Revised:2019-06-18 Online:2020-01-25 Published:2020-01-21
  • Contact: LIAO Daolong

Abstract:

In order to clarify the influence of Meloidogyne incognita on the growth and development of grafted seedlings of wax gourd with different pumpkin rootstocks, the study was aimed to screen rootstock varieties resistant to M. incognita for the wax gourd and promote the industry sustainable development. The resistance level and plant biomass of the grafted wax gourd seedlings with different rootstocks during the whole growth period were studied by artificial inoculation of M. incognita. The results showed that the disease index, root-knot index, egg index, reproduction coefficient of the test materials increased with the progress of the growth period and the resistance level of the test materials changed. The grafted seedling of ‘Haizhen No. 2’ had resistance to M. incognita during the whole growth period. The grafted seedlings of ‘Yinlonghuangzi’ and ‘Haizhen No. 1’ showed high susceptibility. the self-root seedlings of ‘Qingyuan black skin wax gourd’ showed susceptibility to M. incognita . The fresh weights of the shoot and fruit of the grafted seedling of ‘Haizhen No. 2’ showed no significant differences to the uninoculated self-root seedling of ‘Qingyuan black skin wax gourd’ in the middle-late growth period, but significantly higher than that of the grafted seedlings of ‘Yinlonghuangzi’ and ‘Haizhen No. 1’ and self-root seedlings of ‘Qingyuan black skin wax gourd’. It was confirmed that M. incognita could significantly inhibit the growth and yield of the grafted seedlings with susceptible rootstocks, but had no significant effect on those of the grafted seedlings with disease-resistant rootstocks.

Key words: wax gourd, Meloidogyne incognita, rootstocks, resistance level, biomass

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