scholarly journals Effect of Different Synthetic Pesticides Against Pink Bollworm Pectinophora gossypiella (Saund.) On Bt. and non-Bt. Cotton Crop

2017 ◽  
Vol 13 ◽  
pp. 454-458 ◽  
Author(s):  
Imran Rajput ◽  
Keyword(s):  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Bt Cotton ◽  
Cotton Crop ◽  
Synthetic Pesticides

scholarly journals Documentation of Braconid Parasitoids of Pink Bollworm Pectinophora gossypiella on Cotton Crop at Southern Sindh

2019 ◽  
Vol 32 (3) ◽  
Author(s):  
Attaullah Khan Pathan ◽  
Imran Ali Rajput ◽  
Agha Mushtaque Ahmed ◽  
Muhammad Waseen Kalroo ◽  
Muhammad Munir Shahid ◽  
...  
Keyword(s):  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Cotton Crop

scholarly journals Comparative Biology of Pink Bollworm, Pectinophora gossypiella Saund. on Bt. and Non-Bt. Cotton

2019 ◽  
Vol 62 (2) ◽  
pp. 116-121
Author(s):  
Imran Ali Rajput ◽  
Abdul Mubeen Lodhi ◽  
Tajwer Sultana Syed ◽  
Ghulam Hussain Abro ◽  
Imran Khatri
Keyword(s):  
Larval Instar ◽  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Pupal Weight ◽  
Bt Cotton ◽  
Larval Duration ◽  
Biological Parameters ◽  
Total Period ◽  
Pupal Period ◽  
Mortality Percentage

Effect of Bt. and non-Bt. cotton variety was investigated on biological parameters of pink bollworm Pectinophora gossypiella. In biological parameters, maximum larval duration of 4.5±0.07 days were recorded in the first instar on non-Bt. cotton and minimum 2.00±0.06 days in fourth larval instar on Bt. cotton. The larval weight was higher (20.24±1.74 mg) on non-Bt. and minimum on Bt. cotton (13.84±1.34 mg); meanwhile the maximum pupal weight of 23.46±0.55 mg was weighed on non-Bt. cotton and minimum 17.41±0.44 mg on Bt. cotton. A total period of 18.44±0.55 day’s adult female lived on non-Bt. cotton and15.44±0.43 on Bt. cotton. The overall maximum mean numbers of 119±1.99 eggs were observed on non-Bt. cotton as compared to Bt. cotton. Similarly, ovipositional rate was also higher (8.04±0.19 eggs/ female/day) on non-Bt. cotton. The maximum larval duration (11.36±0.30 days) was higher on non-Bt. cotton and minimum on Bt. cotton (8.03±0.43 days); meanwhile the maximum pupal period of 9.73±0.29 days were calculated on Bt. cotton and almost similar days of pupal period on non-Bt. cotton crop, respectively. The highest mortality percentage of all stages was found on Bt. cotton with maximum mortality percentage of 24.59% at 1st larval instar.

scholarly journals Indian scenario on the occurrence of a dreaded insect pest Pink bollworm, Pectinophora gossypiella on Bt cotton-A review

2022 ◽  
Vol 43 (1) ◽  
pp. 11-19
Author(s):  
G.M.V. Prasada Rao ◽  
Keyword(s):  
Large Scale ◽  
Integrated Management ◽  
Insect Pest ◽  
Resistance Management ◽  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Bt Cotton ◽  
Cry Toxins ◽  
Indian Populations ◽  
Indian Scenario

The pink bollworm, Pectinophora gossypiella, has become a significant production constraint on Bt cotton in India. This problem is unique to India because the pest has developed multi-fold resistance to Cry toxins in many Indian populations but not in other countries. Most Indian populations have developed multifold resistance to Cry 1 Ac and Cry 1Ac + Cry 2 Ab toxins. Year-round cultivation of long-duration Bt cotton hybrids on a large scale has a pronounced impact on the incidence. Also discussed other factors responsible for the occurrence of pink bollworm on Bt cotton in India. Insecticide Resistance Management (IRM) strategies implemented by different cotton-growing countries globally; the USA, India, and China had a significant impact on the interaction of pink bollworm on Bt cotton. Huge selection pressure resulted in resistance to Cry toxins. Time-tested IPM, if implemented on a community basis focusing on pheromones technology and closed season, will help sustain the cotton cultivation in India in the future. Thus, this review aims to congregate exhaustive information on the history, biology, resistance to Bt cotton, and Integrated Management (IPM) options for the Indian scenario, which would help researchers in their future endeavors.

scholarly journals Incidence of Pink Bollworm Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) on Flowers (Rosette) of Bt Cotton in Andhra Pradesh, India

2021 ◽  
pp. 90-97
Author(s):  
A. Appala Raju ◽  
G. M. V. Prasada Rao ◽  
V. Chinna Babu Naik ◽  
C. H. Chiranjeevi ◽  
A. K. Patibanda ◽  
...  
Keyword(s):  
Random Sampling ◽  
Andhra Pradesh ◽  
Progressive Increase ◽  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Bt Cotton ◽  
Crop Season ◽  
Survey Results ◽  
Flower Damage

The pink bollworm Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) has recently emerged as a serious menace on Bt cotton in India. Extensive roving surveys were conducted in 12 locations of three major cotton growing districts of Andhra Pradesh, India, to assess the level of pink bollworm infestation in Bt cotton during 2018-19 and 2019-20. The dynamics and severity of flower damage due to pink bollworm during the 60-135 days’ crop period were evaluated based on a random sampling of flowers. Survey results revealed a widespread infestation of pink bollworm on Bt cotton flowers across the surveyed sites in a range of 11.8-19.50%. With the advancement of the crop season, a progressive increase in the flower damage was observed till 120 DAS then declined. Reasons for the enhanced flower damage and implications are discussed in this article.

Effect of host plants on the oviposition preference of pink bollworm, Pectinophora gossypiella (Lepidoptera: Gelechiidae)

2021 ◽  
pp. 1-11
Author(s):  
T.N. Madhu ◽  
K. Murali Mohan
Keyword(s):  
Host Plants ◽  
Oviposition Preference ◽  
Morphological Characteristics ◽  
Pink Bollworm ◽  
Point Of View ◽  
Pectinophora Gossypiella ◽  
Choice Test ◽  
Egg Load ◽  
Bt Cotton ◽  
Cotton Plants

Abstract Pink bollworm (Pectinophora gossypiella (Saunders, 1843)) (Lepidoptera: Gelechiidae) is an important pest of cotton. We aimed to study the effect of different host plants on the oviposition preference of pink bollworm under laboratory conditions. Cotton (Bt and non-Bt), okra and hibiscus plants were used, which vary in morphological characteristics. Significant differences were observed in the density of trichomes and it is positively correlated with oviposition behaviour of pink bollworm. In a no-choice test, we recorded a higher number of eggs on Bt and non-Bt cotton plants. In two-, three- and four-choice experiments, pink bollworm preferred to deposit the maximum number of eggs on non-Bt cotton among other host plants. A substantially higher number of eggs were laid on Bt cotton in combinations with okra and hibiscus and a considerably lower number on non-Bt cotton. We recorded fewer numbers of eggs on hibiscus in all combinations. Overall, pink bollworm moths showed greater affinity towards non-Bt cotton plants and deposited the maximum number of eggs there. From the practical point of view, the development of cotton genotypes which are devoid or have a lesser density of trichomes may be a possible solution to reduce the pink bollworm egg load on cotton.

scholarly journals Pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae) survival on transgenic cotton in India

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
V. Chinna Babu Naik ◽  
Subbireddy KB ◽  
Sandhya Kranthi ◽  
V. S. Nagrare ◽  
Sujit Kumbhare ◽  
...  
Keyword(s):  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Cry Toxins ◽  
Susceptible Population ◽  
Cotton Crop ◽  
Genetically Modified Cotton ◽  
Low Concentrations ◽  
Survival And Development ◽  
Initial Control ◽  
Susceptible Populations

Abstract Background Insecticidal proteins from the Bacillus thuringiensis (Bt) marks the genetically modified cotton crop that was commercialized in India in March 2002 for the control of lepidopteron bollworms. Despite organized initial control, the pink bollworm (PBW), Pectinophora gossypiella (Saunders), adapted itself to cry toxins resulted in field control failures in 2016 and 2017.  The present study was designed to understand the survival and development of PBW populations differing in susceptibility to Cry toxins on Bt and non-Bt plants.  Results For assessment of infestation, populations were collected from different cotton growing states. Per cent infestation of flowers and green bolls in the study areas were in the range of 3.09–29.26 and 36–91.20% for flowers and green bolls, respectively. Among different locations highest magnitude of resistance to Cry1Ac (371.8-fold) and Cry2Ab (4214.3-fold) was spotted in late season populations of Rajkot collected from bolls. Further, in order to confirm field level resistance of surviving larvae on high and low concentrations of Cry toxins, larvae were pooled and subjected to boll bioassays. Results revealed that, none of the larvae from susceptible populations survived on BGII bolls. Although, the same populations showed a survival of 38 and 32%, which led to 80% locule damage on non-Bt cotton. Maximum survival (32%) and locule damage (70%) was observed for Maharashtra (F-H) Cry2Ab and Gujarat (B-H) Cry2Ab populations recorded 36% survival and 70% mortality, respectively, on BGII cotton and 58.33% survival and 60% locule damage on non-Bt cotton, respectively. Populations derived from survivals on low concentrations produced the lowest survival and locule damage on Bt cotton. Maximum number of mines on epicarp (2.4 mines/boll) was recorded by susceptible population on NBt cotton. Green bolls of Bt and NBt cotton did not differ in the number of mines. Conclusion It was concluded that none of the larvae from susceptible populations survived on BGII bolls. Although, the same populations showed a survival of 38 and 32%, which led to 80% locule damage on non-Bt cotton

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