Effect of Weather Parameters on Population Buildup of Predatory Coccinellids and Spiders Present in Brinjal Crop Ecosystem of Assam

Borkakati, Rudra N.; Saikia, Dilip

doi:10.20546/ijcmas.2020.909.014

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Findings related to coccinellids are validated by who reported negative and nonsignificant correlation with rainfall and positive and non-significant correlation with temperature (maximum and minimum) and evening relative humidity. Findings are also in accordance with those of Mohapatra et al (2018) and Kumar and Singh (2021) who reported non-significant and negative correlation with rainfall, contrarily Borkakati and Saikia (2020) reported non-significant and positive correlation of coccinellid with rainfall. In case of spiders, our findings were endorsed by Patel et al (2013) who reported negative and significant correlation of spiders with rainfall.…”

Section: Influence Of Weather Parameters On Insect-pests Of Black Gramsupporting

confidence: 92%

“…In case of spiders, our findings were endorsed by Patel et al (2013) who reported negative and significant correlation of spiders with rainfall. Similarly, Kumar and Singh (2021) and Borkakati and Saikia (2020) also supported the present findings and reported positive and non-significant correlation of spiders with minimum temperature and negative and non-significant correlation with rainfall.…”

Section: Influence Of Weather Parameters On Insect-pests Of Black Gramsupporting

confidence: 89%

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Population dynamics of important insect pests of Black gram and their correlation with abiotic factors

Chauhan¹,

Verma²,

Jakhar³

et al. 2022

EEC

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Black gram is an important pulse crop, which observes 30-50 % losses in yield due to insect pest damage. It is crucial to understand the spectrum of pest damaging it in field, and their response to the prevailing environmental conditions. Population dynamics of important insect pests and their correlation with abiotic factors was studied at CCS HAU, Hisar during kharif 2020. The study was carried out from July, 2020 i.e., 30th standard meteorological week (SMW) to October 2020 (39th standard meteorological week). Insect pests whose infestation was recorded during this period includes Bemisia tabaci, Empoasca kerri, Clavigralla gibbosa, Riptortus pedestris, Maruca vitrata and Trichoplusia ni. No infestation of Helicoverpa armigera and Spodoptera litura was recorded. Natural enemies like Coccinella septumpuctata and spiders were also observed. Out of these, whitefly was observed as most important insect pest causing significant damage to crop. Whitefly incidence commenced in 30th-SMW (19.70 adult/cage) and continued till 39th-SMW (13.35 adult/cage) with its peak population in 31st-SMW (41.75 adult/cage). Rainfall was recorded to be the major factor affecting the population of whitefly adult as significant and negative correlation was reported between the two (r = -0.682*). Further highly significant and negative correlation was observed between spotted pod borer larvae and wind speed (r = -0.792**). This study provides basic understanding about the range of pests damaging crop, and their behavior towards various abiotic factors.

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Section: Influence Of Weather Parameters On Insect-pests Of Black Gramsupporting

confidence: 92%

Section: Influence Of Weather Parameters On Insect-pests Of Black Gramsupporting

confidence: 89%

Population dynamics of important insect pests of Black gram and their correlation with abiotic factors

Chauhan¹,

Verma²,

Jakhar³

et al. 2022

EEC

View full text Add to dashboard Cite

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Population Dynamics of Major Insect Pests and Natural Enemies in Tomato

Bora,

Borah,

Bora

et al. 2024

IJE

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An experiment on major insect pests and natural enemies of tomato was conducted during rabi, 2022-23 at the experimental farm for PG research, Biswanath College of Agriculture, Sonitpur. Results revealed eleven insect pests; whitefly, Bemisia tabaci (Gennadius); aphid, Aphis craccivora Koch; leafminer, Lyriomyza trifolii (Burgess); fruitborer, Helicoverpa armigera (Hubner); jassid, Amrasca biguttula biguttula (Ishida); semilooper, Trichoplusia ni (Hubner) were found to be the most dominant species. Two coccinellid predators viz., Micraspis discolor(F) and Cheilomenes sexmaculata (F) and two spiders Lycosa tista Tikader, Anyphaena accentuata (Walckenaer) were recorded as natural enemies. It was observed that the incidence of B. tabaci, A. craccivora and A. biguttula biguttula showed significant negative correlation with both maximum and minimum temperature. B. tabaci population registered a positive significant correlation with morning relative humidity. Both L. trifolii and H. armigera exhibited significant negative correlation with bright sunshine hour. Furthermore, T. ni showed significant negative correlation with maximum temperature and bright sunshine hour. As regards coccinellids, a significant negative correlation existed with maximum and minimum temperature, and rainfall and significant positive correlation with morning relative humidity. A significant positive correlation of aphids was also observed with coccinellids.

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Effect of Weather Parameters on Population Buildup of Predatory Coccinellids and Spiders Present in Brinjal Crop Ecosystem of Assam

Cited by 2 publications

References 2 publications

Population dynamics of important insect pests of Black gram and their correlation with abiotic factors

Population dynamics of important insect pests of Black gram and their correlation with abiotic factors

Population Dynamics of Major Insect Pests and Natural Enemies in Tomato

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