Succession and Seasonal Incidence of Major Insect Pests of Indian Gooseberry and their Relation with Meteorological Parameters

Author: A.L. Choudhary, K.C. Kumawat, Amar Chand and R.K. Nayak

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Abstract

The investigation entitled ‘Succession and seasonal incidence of major insect pests of Indian gooseberry and their relation with meteorological parameters’ was conducted at Asalpur Farm, SKN College of Agriculture, Jobner (Rajasthan) during the year 2019 and 2020. The study on the succession and incidence of insect pests revealed that the leaf roller, Caloptilia (=Gracillaria) acidula (Meyr.); shoot gall maker, Hypolamprus (=Betousa) stylophora (Swinhoe); bark eating caterpillar, Indarbela tetraonis Moore, I. quadrinotata (Walker) and fruit borer, Deudorix (=Virachola) isocrates (Fab.) were recorded as major insect pests quantitatively at different phenology of Indian gooseberry. The peak population (46.60 and 44.80/ 5 shoots) of leaf roller was recorded in the last week of September (39th SMW), 2019 and 2020. The leaf roller population had positive significant correlation (r=0.44, 0.39, respectively during 2019 and 2020) with the minimum temperature. The maximum shoot gall maker damage of 6.60-7.40 per cent was observed in last week of August (35th SMW) to first week of September (36th SMW). The mean relative humidity had significantly positive correlation (r=0.57, 0.65) during both the years of investigation. The damage of bark eating caterpillar was observed at its peak (4.0-5.0/ 5 plants in 2019 and 2020) in first week of September. The bark eating caterpillar had significantly positive correlation (r=0.54, 0.61) during both the years with the mean relative humidity. The peak infestation of fruit borer was recorded to be 16.00 and 15.00 per cent in 2019 and 2020, respectively in the 38th SMW (3rd week of September). Due to the seasonal changes in any area the incidence of insect-pest also affects with availability of their suitable environmental conditions.

Keywords

Succession, incidence, leaf roller, shoot gall maker, bark eating caterpillar, fruit borer Indian gooseberry, natural enemies, preying mantid and ladybird beetle

Conclusion

The leaf roller, Caloptilia (=Gracillaria) acidula (Meyr.); shoot gall maker, Hypolamprus (=Betousa) stylophora (Swinhoe); bark eating caterpillar, Indarbela tetraonis Moore and I. quadrinotata (Walker) fruit borer, Deudorix (=Virachola) isocrates (Fab.) were recorded as major insect pests quantitatively at different phenology of Indian gooseberry. The peak population (46.60 and 44.80/ 5 shoots) of leaf roller was recorded in the last week of September (39th SMW) 2019 and 2020. The meteorological parameters during the peak population of the leaf roller exhibited 20.80-24.30°C minimum temperature, 32.80-36.90°C maximum temperature and 59.00-75.00 per cent mean relative humidity. The leaf roller population had positive significant correlation (r=0.44, 0.39, respectively during 2019 and 2020) with the minimum temperature. The maximum shoot gall maker damage of 6.60-7.40 per cent in last week of August (35th SMW) to first week of September (36th SMW) when minimum temperature of 19.50-21.30°C, maximum temperature of 31.70-33.90°C and mean relative humidity of 83.00-84.00 per cent. The mean relative humidity had significantly positive correlation (r=0.57, 0.65) during both the years of investigation. The damage of bark eating caterpillar was observed at its peak (4.0-5.0/ 5 plants in 2019 and 2020, respectively) in first week of September. The minimum temperature, maximum temperature, mean relative humidity and rainfall at peak period of infestation were registered to be 21.30-22.90°C, 31.70-33.80°C, 83.00-84.00 per cent, respectively. The bark eating caterpillar had significantly positive correlation (r=0.54, 0.61) during both the years with the mean relative humidity. The peak infestation of fruit borer was recorded to be 16.00 and 15.00 per cent in 2019 and 2020, respectively in the 38th SMW (3rd week of September). The minimum temperature, maximum temperature and mean relative humidity at peak period of infestation were registered to be 21.50-23.30°C, 35.20-37.30°C and 63.00 per cent, respectively. The natural enemies (parasites and predators) associated with the insect pests on Indian gooseberry were Trichogrmma chilonis; Tetrastichus sp.; green lacewing, Chrysoperala zastrowi arabica (Henry et al.); preying mantid, Mantis religiosa (L.); ladybird beetle, Adalia bipunctata (L.); yellow wasp, Polistes hebraeus (F.); assassin bug, Harpactor costalis (Stal); spider and black ant, Camponotus compressus (Fab.) but meagre in numbers.

References

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How to cite this article

A.L. Choudhary, K.C. Kumawat, Amar Chand and R.K. Nayak (2023). Succession and Seasonal Incidence of Major Insect Pests of Indian Gooseberry and their Relation with Meteorological Parameters. Biological Forum – An International Journal, 15(2): 880-886.