Agrometeorological determinants of population dynamics of semilooper, Trichoplusia ni (Hubner) and cabbage butterfly, Pieris brassicae (Linnaeus) on cabbage
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2022-04-27 |
| Journal | Journal of Agrometeorology |
| Authors | Purti, Krishna Rolania |
| Institutions | Chaudhary Charan Singh Haryana Agricultural University |
| Citations | 1 |
| Analysis | Full AI Review Included |
Technical Documentation & Analysis: 6CCVD MPCVD Diamond
Section titled âTechnical Documentation & Analysis: 6CCVD MPCVD DiamondâExecutive Summary
Section titled âExecutive SummaryâThis analysis addresses the provided research paper, âAgrometeorological determinants of population dynamics of semilooper, Trichoplusia ni (Hubner) and cabbage butterfly, Pieris brassicae.â As an expert material scientist for 6CCVD, we note that the study focuses exclusively on agricultural entomology and meteorology, containing no data relevant to Chemical Vapor Deposition (CVD) diamond materials, optics, thermal management, or high-power electronics.
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Technical Specifications
Section titled âTechnical SpecificationsâThe following table extracts key quantitative data points from the provided agricultural research paper. While these parameters are not related to diamond material properties, they represent the specific experimental outcomes reported by the authors.
| Parameter | Value | Unit | Context |
|---|---|---|---|
| Max Temp Correlation (Semilooper) | 0.92* | N/A | Positive correlation (2017-18 & 2018-19) |
| Min Temp Correlation (Semilooper) | 0.85* / 0.79* | N/A | Positive correlation (2017-18 / 2018-19) |
| Evening RH Correlation (Semilooper) | -0.88* / -0.92* | N/A | Negative correlation (2017-18 / 2018-19) |
| Sunshine Hours Correlation (Cabbage Butterfly) | 0.83* | N/A | Significant positive correlation (2017-18) |
| Regression R2 Value (Semilooper) | 0.87 | N/A | Variability explained by weather (2017-18) |
| Regression R2 Value (Semilooper) | 0.84 | N/A | Variability explained by weather (2018-19) |
| Maximum Larval Population (Cabbage Butterfly) | 38.80 | larvae/plant | Recorded in 13th SMW (2017-18) |
| Experimental Area Size | 100 | m2 | Field experiment plot size |
Note: Asterisk () denotes significance at the 5 per cent level.*
Key Methodologies
Section titled âKey MethodologiesâThe research employed standard field entomology and meteorological correlation techniques. These methods are not applicable to MPCVD diamond synthesis but describe the experimental setup for the population dynamics study:
- Field Setup: Cabbage seedlings (variety âGolden Acreâ) were transplanted in late December into a 100 m2 area using 60 Ă 45 cm spacing.
- Experimental Design: The area was divided into four 5m Ă 5m quadrates. Recommended agronomic practices were followed, but all insecticidal treatments were excluded to maintain a natural habitat.
- Observation Period: Observations were recorded during the ârabiâ season (2017-18 and 2018-19), from the vegetative stage (28 DAT) until harvesting.
- Pest Counting: Larval populations of semilooper and cabbage butterfly were recorded using the direct visual count method on five randomly selected, tagged plants at weekly intervals.
- Meteorological Data Collection: Data on maximum temperature, minimum temperature, relative humidity (morning and evening), wind speed, sunshine hours, and rainfall were obtained from the Agrometeorological Observatory.
- Statistical Analysis: Correlation coefficients and multiple linear-regressions were determined using SPSS 20.0 to link larval population fluctuations with weather parameters.
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View Original Abstract
Insect-pests population in any crop is determined by prevailing weather parameters as they determined growth as well as reproduction of insect-pests.Cabbage (Brassica oleracea var.capitata) a member of Brassicaceae family, is an important edible cole crop grown throughout the India.It contains protein, minerals, vitamins, amino acids, essential fatty acids and dietary fibers.It is one of the best natural antioxidant and sources of vitamin C. In the local farming system, cabbage is usually part of a diversified cropping pattern and mostly grown as a cash crop for local market (Macharia et al., 2005).Cabbage is grown in winter month arranging from end of December to 1 st week of April.This period is marked with considerably variations in day and night temperature as well as photoperiod.A major constraint in the production of cabbage is the damage of insect-pests.Insect-pests are reducing 40 per cent of the total attainable yield of vegetables and nearly 60-80 per cent on an average yield loss in crucifer crops.The important insectpests that infest cabbage crop are the tobacco caterpillar, diamond back moth, cabbage semilooper, painted bug, cabbage butterfly, flea beetle, cabbage aphid, cabbage leaf webber and the mustard saw fly (Ahuja et al., 2012).The cabbage semilooper is a cosmopolitan insect that causes damage in more than 160 species of plants (Sutherland and Greene, 1984).Cabbage butterfly alone causes 40 per cent yield loss annually in India (Hasan and Ansari, 2010) in cruciferous vegetables.This transition in meteorological parameters coincides with one of the other phases of insect-pests etiology like oviposition, hatching, larval, pupal and adult longevity.Likewise, these agrometeorological parameters coincide with growth and development in cabbage crops.Tri part type interaction between agrometeorological parameters growth stages in insect-pests and host plant physiology and resistance determine the population dynamics.In view of these facts the study was conducted on corollary between agrometeorological parameters and insect-pests growth as well as population dynamics and crop variety âGolden acreâ in cabbage as a host plant.This study deals with association between weather parameters and insect-pests dynamics.The field experiment was conducted at Experimental Area, Department of Entomology, CCS Haryana Agricultural University, Hisar, during the ârabiâ season of 2017-18 and 2018-19.Cabbage seedlings of variety âGolden Acreâ were transplanted in end of December in 100 m 2 area by adopting 60Ă 45 cm spacing.The area was divided into four quadrates each of size 5m Ă 5m.All the recommended agronomic practices were followed to raise the healthy cabbage crop.The experiment excluded all kind of insecticidal treatment on any growth stage of crop for avoiding the disturbance in natural habitat of insect-pests.The population of semilooper, Trichoplusia ni and cabbage butterfly, Pieris brassicae was recorded by counting the number of larvae on whole plant by adopting the direct visual count method.All the open leaves and heads of the selected plants were observed thoroughly and count the number of larvae per plant.Only larval stage of both pests was considered and the observations were recorded at vegetative stage (28 DAT) till harvesting stage of cabbage.Plants were tagged for further observations.The observations were recorded from five randomly selected plants and subsequent observations were recorded at weekly interval.The data on important weather parameters viz., maximum temperature, minimum temperature, relative humidity (both morning and evening), wind speed, sunshine hours and rainfall were obtained from the Agrometeorological Observatory, CCS Haryana Agricultural University, Hisar.The population of semilooper and cabbage butterfly on cabbage crop was correlated with different weather parameters in both the years.In addition to correlation, regression coefficients for environmental parameters were also estimated by multiple linear-regressions.Correlation of population fluctuations of insect-pests with different meteorological parameters was worked out and multiple linear-regressions were determined by using SPSS 20.0 version. The correlation coefficient between larval population