Mai Văn Trị. 2019. Study on the causal agent and control measures of trunk canker on jackfruit in the southeastern. PhD Thesis. Institute of Agricultural Sciences for Southern Vietnam |
Jackfruit (Artocarpus heterophyllus Lam.; Moraceae) is currently one of the high value crops in Vietnam with more than 24,000 ha. Trunk canker, a serious disease by Phytophthora palmivora, has been causing significant losses for jackfruit production. The study aims at identifying the causal agent of the jackfruit trunk canker and studying measures for controlling the disease in the Southeastern region |
Submitted in November 1, 2019 at the IAS, Vietnam.
PLANT PROTECTION Code: 9620112 Supervisors: Prof. Dr. Nguyen Van Tuat and Dr. Nguyen Van Hoa
ABSTRACT
Jackfruit (Artocarpus heterophyllus Lam.; Moraceae) is currently one of the high value crops in Vietnam with more than 24,000 ha. Trunk canker, a serious disease by Phytophthora palmivora, has been causing significant losses for jackfruit production. The study aims at identifying the causal agent of the jackfruit trunk canker and studying measures for controlling the disease in the Southeastern region. P. palmivora was identified via morphological characteristics and the sequencing results of the rDNA-ITS region and the COX II gene. Solutions were proposed as (1) Using tolerant variety La Lon; (2) Building ditches between rows and planting on raised mound for good drainage in the orchards; (3) Amending chicken manure (12 tons/ha/year) or cow manure (16 tons/ha/year); (4) Soil drenching twice combined with canopy-spraying Trichoderma harzianum SR18 three times during rainy seasons (May – Oct.); and (5) Canopy spraying twice alternating with soil drenching twice Potassium phosphite 1% during rainy seasons. The study was highlighted as:
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