Impact of Multiple Insect-Pest Incidence on Yield in Basmati Rice

Abstract

The experiments for determining the multiple insect-pest incidence on yield loss in basmati rice was conducted for two crop seasons. Five treatments were, viz. application of imidacloprid in vegetative stage; application of granular insecticide in vegetative stage; application of higher dose of Urea; augmentive releases of yellow stem borer egg mass at vegetative and booting stage; untreated control. During both the years, the correlation between grain yield and dead heart, leaf folder damage and planthopper population at 50 and 65 DAT and white ear at maturity was negative. The analysis of variance of regression analysis of yield Vs damage levels at different crop growth stages during both the years revealed a significant linear relationship. The yield loss was highly related to incidence of stem borer and leaf folder damage at 50 and 65 DAT during both the years. For integrated pest management, effective monitoring of stem borer and leaf folder from 50 to 65 DAT is required, which appeared as a critical crop growth stage. The farmers should remain cautious during this period to prevent yield loss.

Infestation Suppression under Evaluation of Ecofriendly Insecticides against Major Insect Pests of Rice in Eastern Uttar Pradesh Conditions

“…The ranking of evaluation of ecofriendly insecticides under suppression over check (SPOC) against major insect pests of rice was observed as, Imidacloprid > CartapHcl > Neem Oil + Btk > Chlorantraniliprole > Indoxacarb > Chlorpyriphos > Thiamethoxam > Neem Oil > Btk for highest suppression over check; Imidacloprid > CartapHcl > Neem Oil + Btk > Chlorantraniliprole > Indoxacarb > Chlorpyriphos > Thiamethoxam > Neem Oil > Btk for lowest infestation of insect pests; CartapHcl > Imidacloprid > Neem Oil + Btk > Chlorantraniliprole > Indoxacarb > Chlorpyriphos > Neem Oil > Thiamethoxam > Btk for highest yield; and Imidacloprid > CartapHcl > Neem Oil + Btk > Chlorantraniliprole > Indoxacarb > Chlorpyriphos > Thiamethoxam > Neem Oil > Btk for mean of lowest infestation, highest suppression over check, and highest yield respectively (Table 3). Similar findings were reported by Chakraborty [9], Chakraborty and Deb [10], Kulagod et al [11], CRRI [21], Rath et al [12], Sarao et al [13] and Tigga et al [14].…”

“…Rath et al [12] have been observed that, the infestations of yellow stemborer (Scirpophaga incertulus Walker) and rice earheadbug (Leptocorisa acuta Thunberg) were recorded lowest in Imidacloprid and highest grain yield was recorded in Thiamethoxam treated plots. Sarao et al [13] and Tigga et al [14] have been studied that, the infestation of yellow stemborer (Scirpophaga incertulus Walker) and rice earheadbug (Leptocorisa acuta Thunberg) were lowered by Imidacloprid.…”

Ecofriendly insecticides for the management of rice earheadbug (Leptocorisa acuta Thunberg) under eastern Uttar Pradesh conditions

“…(Table 3). Similar results were also reported by CRRI (2014) [3] , Rath et al (2014) [19] , Sarao et al (2015) [20] , Tigga et al (2018) [24] , and Sharanappa et al (2019) [21] . Present research work was adopted the lowest P:D ratio, respective to non-significant lowest infestation as scale to confined efficacy of insecticides as ecofriendly.…”

“…Rath et al (2014) [19] have been reported that, plots treated with Imidacloprid recorded lowest infestation of rice earhead bug (Leptocorisa acuta) and highest grain yield followed by Thiamethoxam. Sarao et al (2015) [20] and Tigga et al (2018) [24] both have been found that, the damage rice earheadbug (Leptocorisa acuta) were recorded lowest in Imidacloprid. Sharanappa et al (2019) [21] have been found that, the application of Imidacloprid observed favour the high population of coccinellids.…”

Evaluation of some newer ecofriendly insecticides against major insect pests of rice under eastern Uttar Pradesh conditions

“…Rath et al (2014) [23] has been reported that, plots treated with Imidacloprid recorded lowest infestation of yellow stemborer (Scirpophaga incertulus) and rice earhead bug (Leptocorisa acuta) and highest grain yield followed by Thiamethoxam. Sarao et al (2015) [25] and Tigga et al (2018) [30] both have been found that, the damage of yellow stemborer (Scirpophaga incertulus) and rice earhead bug (Leptocorisa acuta) were recorded lowest in Imidacloprid. Sharanappa et al (2019) [27] have been found that, the application of Imidacloprid observed favour the high population of coccinellids.…”