Work

Field life tables and key mortality factors of Pieris brassicae (Linnaeus) (Lepidoptera, Pieridae) infesting cauliflower (Brassica oleracea var. botrytis) in Punjab, India

Year: 2024

Type: article

Abstract: To find out the key mortality factors of Pieris brassicae (Linnaeus) on cauliflower (Brassica oleracea var. botrytis), this study of field life table was conducted during 2021-22 at the research farm of the Punjab Agricultural University, Ludhiana, Punjab. Among biotic factors, Cotesia glomerata, Beauveria bassiana (Bals.), NPV, Bacillus thuringiensis (Berliner) were the main causes of mortality. Other unknown factors (temperature, rainfall, relative humidity) also contrived slight decline to all the immature stages of P. brassicae. Results revealed that the egg stage (17.46-28.35%) affected due to unknown factors, whereas, early larval instar stage (I-III) was the most sensitive, showing the highest loss (36.62-43.95%) followed by the late larval instar stage (25.77-29.43%) and pupal stage (16.19-22.41%). The trend index was positive uring both seasons 16.91 (main season) and 19.17 (late season), indicating that population of P. brassicae increased in next season. Similar trend was observed in generation survival i.e. 0.39 (main season) and 0.32 (late season).

Source: ENTOMON

DOI: 10.33307/entomon.v49i4.1336

Authors: Deep Shikha, Ravinder Singh Chandi, Sanjeev Kumar Kataria, Jaspreet Sidhu

Institutions: Punjab Agricultural University, University of California Division of Agriculture and Natural Resources

Language: English

Topic: Insect-Plant Interactions and Control

Subfield: Insect Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: diamond

Funder: Punjab Agricultural University