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<p>Leaf gall midge (<i>Procontarinia matteiana</i>) is a major insect-pest of mango orchards which damages flush leaves and limits optimum fruit yield. Various control measures have been adopted against this pest but have not yielded satisfactory results due to its hidden nature of damage. Melatonin (MT), which plays a key role in plant growth and development, has been well documented to protect plants against a variety of abiotic and biotic stresses. Therefore, we evaluated the exogenous application of MT {10 and 20 parts per million (ppm)} against mango leaf gall midge at different reproductive stages during 2021 and 2022. Treatments include 10 ppm at flowering stage, 10 ppm at marble stage, 10 ppm at mature green stage, 20 ppm at flowering stage, 20 ppm at marble stage, 20 ppm at mature green stage, 10 ppm at flowering and marble stages, and 10 ppm at all three stages along with an untreated control. Results showed that MT application, especially higher dose (20 ppm) or multiple applications with 10 ppm at different stages, significantly attenuated gall midge infestation and severity of galls on leaves (<i>P</i> &lt; 0.05). The phenol and chlorophyll contents in mango leaves increased significantly in MT treatments than untreated control (<i>P</i> &lt; 0.05). Our results contribute to a new understanding of exogenous application of MT for the control of <i>P. matteiana</i> and provide an environmentally friendly approach to prevent gall midge infestation on mango leaves.</p>

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Exogenous melatonin reduces gall midge infestation in mango leaves by increasing chlorophyll content and phenolics

  • 期刊论文

  • 发表日期：

    2025年12月23日

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  • Neha Sinha,
  • Sareeta Nahakpam,
  • Santosh Kumar Chaudhary,
  • Sanjay Sahay,
  • Anil Kumar Singh,
  • Sunil Kumar Yadav

摘要

Leaf gall midge (Procontarinia matteiana) is a major insect-pest of mango orchards which damages flush leaves and limits optimum fruit yield. Various control measures have been adopted against this pest but have not yielded satisfactory results due to its hidden nature of damage. Melatonin (MT), which plays a key role in plant growth and development, has been well documented to protect plants against a variety of abiotic and biotic stresses. Therefore, we evaluated the exogenous application of MT {10 and 20 parts per million (ppm)} against mango leaf gall midge at different reproductive stages during 2021 and 2022. Treatments include 10 ppm at flowering stage, 10 ppm at marble stage, 10 ppm at mature green stage, 20 ppm at flowering stage, 20 ppm at marble stage, 20 ppm at mature green stage, 10 ppm at flowering and marble stages, and 10 ppm at all three stages along with an untreated control. Results showed that MT application, especially higher dose (20 ppm) or multiple applications with 10 ppm at different stages, significantly attenuated gall midge infestation and severity of galls on leaves (P < 0.05). The phenol and chlorophyll contents in mango leaves increased significantly in MT treatments than untreated control (P < 0.05). Our results contribute to a new understanding of exogenous application of MT for the control of P. matteiana and provide an environmentally friendly approach to prevent gall midge infestation on mango leaves.