Weather based forecasting model for emergence of Aprostocetus purpureus (Cameron) – a parasitoid of lac insect, Kerria lacca (Kerr)

Authors

  • MOHANASUNDARAM ARUMUGAM ICAR-National Research Centre for Banana, Trichy - 620 102, Tamil Nadu, India
  • KEWAL KRISHAN SHARMA ICAR-National Institute of Secondary Agriculture, Ranchi - 834 010, Jharkhand, India
  • MOHAMMAD MONOBRULLAH ICAR Research Complex for Eastern Region, Patna - 800 014, Bihar, India
  • JAIPAL SINGH CHOUDHARY ICAR RCER, Farming System Research Centre for Hill and Plateau Region, Ranchi– 834 010, Jharkhand, India
  • ACHINTYA PRAMANIK ICAR-National Institute of Secondary Agriculture, Ranchi - 834 010, Jharkhand, India
  • NAASERAH ZEESHAN ICAR-National Institute of Secondary Agriculture, Ranchi - 834 010, Jharkhand, India
  • MUNNA YADAV ICAR-National Institute of Secondary Agriculture, Ranchi - 834 010, Jharkhand, India

DOI:

https://doi.org/10.54386/jam.v25i4.2345

Keywords:

Lac insect, Aprostocetus purpureus, rangeeni, baisakhi, correlation, regression, prediction

Abstract

Indian lac insect, Kerria lacca is a scale group beneficial insect which suffers by several natural enemies. The establishment of the relationship between the incidences of natural enemies on lac insects with weather variables is essential for formulating management strategies well in advance. The relationship between weather factors and the emergence of A. purpureus was studied from 2011–12 to 2020–21 on the rangeeni summer (baisakhi) lac crop. Correlation and regression analyses were done after pooling ten years data (2011-12 to 2020-21) during the critical lac growth period i.e. SMW 8 to SMW 20. The relative abundance of lac-associated fauna showed that three parasitoids ((Aprostocetus purpureus, Tachardiaephagus tachardiae, and Tyndarichus(=Parechthrodryinus) clavicornis)) and one predator (Eublemma amabilis) were abundant. Among them, A. purpureus recorded maximum percent infestation, which was 84% and 75% on ber and palas, respectively. Maximum number of A. purpureus was emerged during the sexual maturity period (8 to 20 SMW) of the summer lac crop. The incidence exhibited a significant negative correlation with maximum (Tmax) and minimum temperature (Tmin) and a significant positive correlation with morning and evening relative humidity (RH-II).  Stepwise regression analysis showed Tmax and RH-II were the most important factors contributing to 68% variation in the incidence of A. purpureus on palas. The present study results indicated that environmental factors played a significant role in the incidence of parasitoids on lac insect.

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Published

30-11-2023

How to Cite

ARUMUGAM , M., SHARMA, K. K., MOHAMMAD MONOBRULLAH, CHOUDHARY, J. S., ACHINTYA PRAMANIK, NAASERAH ZEESHAN, & MUNNA YADAV. (2023). Weather based forecasting model for emergence of Aprostocetus purpureus (Cameron) – a parasitoid of lac insect, Kerria lacca (Kerr). Journal of Agrometeorology, 25(4), 589–594. https://doi.org/10.54386/jam.v25i4.2345

Issue

Vol. 25 No. 4 (2023): December (Silver Jubilee Publication)

Section

Research Paper

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Copyright (c) 2023 MOHANASUNDARAM ARUMUGAM , KEWAL KRISHAN SHARMA, MOHAMMAD MONOBRULLAH, JAIPAL SINGH CHOUDHARY, ACHINTYA PRAMANIK, NAASERAH ZEESHAN, MUNNA YADAV

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