Effect of Abiotic Factors on the Population Fluctuation of Yellow Mite, Polyphagotarsonemus latus (Banks) on Chilli and their Correlation

Author: Laxman Singh Saini, Hari Prasad Meghwal, Bal Kishan Patidar and Mangal Sukhi Meena

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Abstract

Chilli mites pose a significant threat to chili crops globally, causing substantial yield losses through leaf damage, reduced photosynthesis, and fruit distortion. Effectively managing chilli mite infestations is challenging due to their rapid reproduction, ability to develop resistance to pesticides, and the complexity of interacting factors such as temperature, humidity, and crop physiology that influence their population dynamics. So, we conducted a field experiment to study the population fluctuation of yellow mite, Polyphagotarsonemus latus(Banks) in chilli crop and its relation with different weather variables during rabi seasons, 2020-21 under unprotected conditions. The results revealed that the mite incidence (0.73 mite/3 leaves) was initially started after 5th week of transplanting of chilli seedling (47th SMW). Population of mite was gradually increased and reached it’s peak (3.47 mite/3 leaves) after 17th week of transplanting (7th SMW) and their after mite population decrease and remained active up to 22nd weeks after transplanting (12th SMW) with mean population 0.87mite/3 leaves. Correlation of mite population with weather parameters revealed that maximum temperature, minimum temperature, evening relative humidity and rainfall showed negatively correlated (r= - 0.4218, - 0.6286, -0.2020 and -0.1264, respectively) while, morning relative humidity was positively correlated (r= 0.1812).

Keywords

Chilli, Yellow mite, Correlation, Abiotic factors, Population fluctuation

Conclusion

The mite incidence (0.73 mite/3 leaves) was initially started 3rdweek of November of (47th SMW) and reached it’s peak (3.47 mite/3 leaves) second week of February (7th SMW). Mite population showed negative correlation with maximum temperature, minimum temperature, evening relative humidity and rainfall while, positively correlation with morning relative humidity.

References

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How to cite this article

Laxman Singh Saini, Hari Prasad Meghwal, Bal Kishan Patidar and Mangal Sukhi Meena (2023). Effect of Abiotic Factors on the Population Fluctuation of Yellow Mite, Polyphagotarsonemus latus (Banks) on Chilli and their Correlation. Biological Forum – An International Journal, 15(8a): 115-118.