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 PERKEMBANGAN DAN REPRODUKSI CROCIDOLOMIA PAVONANA (F.) (LEPIDOPTERA: PYRALIDAE) PADA PAKAN ALAMI DAN SEMIBUATAN

2004 ◽  
Vol 4 (2) ◽  
pp. 53-61
Author(s):  
Novalia Jelita Sari ◽  
Djoko Prijono
Keyword(s):  
Emerging Adults ◽  
Chinese Cabbage ◽  
Larval Instar ◽  
The Other ◽  
Pupal Weight ◽  
Artificial Diets ◽  
Adult Lifespan ◽  
Pupal Period ◽  
Microbial Inhibitors ◽  
Lepidoptera Pyralidae

Development and reproduction of Crocidolomia pavonana (F.) (Lepidoptera: Pyralidae) on natural and artificial diets.  Development and reproduction of Crocidolomia pavonana on natural and artificial diets were studied in the laboratory (25.2 ± 0.9 C; 84.6% ± 6.7% RH; ca. 12 h photophase).  The natural diets tested were broccoli, cabbage, chinese cabbage, and cauliflower leaves.  The artificial diets used were agar–based general lepidopteran diets mixed with red bean or broccoli leaves, and supplemented with vitamins and microbial inhibitors.  Observation of insect development was done since the egg stage.  After the eggs hatched, larvae were kept singly in plastic cups and fed with appropriate diets.  Fifty larvae were used for each diet.  Records were kept with regard to the duration of each larval instar, pupal period, and the pupal weight.  The emerging adults were paired, and then the number of dead adults and that of eggs laid were recorded daily.  On all the natural diets tested, the larval stage of C. pavonana passed through four instars.  The egg incubation, total larval developmental, and pupal period of C. pavonana on chinese cabbage were the shortest compared to those on the other natural diets.  The pupal weight, however, was the highest on broccoli, followed by that on chinese cabbage, cabbage, and cauliflower.  The female fecundity was also the highest on broccoli (average 258 eggs/female) followed by that on chinese cabbage (212), cauliflower (162), and cabbage (102).  Broccoli diet also yielded adults with the longest lifespan although the adult lifespan on broccoli was not significantly different from that on the other natural diets, except that of males on cabbage.  C. pavonana failed to develop successfully on six kinds of artificial diets tested.  The best artificial diet (broccoli–based diet with microbial inhibitors 20% of the normal amount) only yielded two males and five females with deformed wings, but none of the emerging females produced eggs.

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 Diet impacts on the biological aspects of pink bollworm, Pectinophora gossypiella (Lepidoptera: Gelechiidae) under controlled laboratory conditions

PLoS ONE ◽  
2021 ◽  
Vol 16 (11) ◽  
pp. e0258431
Author(s):  
Arbab Ihsan ◽  
Khalid Ali Khan ◽  
Muhammad Sagir ◽  
Ahmad Nawaz ◽  
Sajid Fiaz ◽  
...  
Keyword(s):  
Wheat Germ ◽  
Large Scale ◽  
Pink Bollworm ◽  
Pectinophora Gossypiella ◽  
Pupal Weight ◽  
Standard Diet ◽  
Significant Difference ◽  
Biological Aspects ◽  
Important Cash Crop ◽  
The Impact

Background Pink bollworm, Pectinophora gossypiella (Lepidoptera: Gelechiidae) is a native pest of Asia and preferably invasion on cotton (Gossypium hirsutum L.) crop as a commendatory host plant. Commercially, G. hirsutum is known as white gold and is an important cash crop all over the globe. Limited studies were published to focus on certain dietary compositions against different cotton pests. Therefore, the present study was undertaken in the laboratory under controlled conditions (temperature: 27 ± 2°C and relative humidity: 60 ± 10%) to determine the impact of three different treatment diets (wheat germ meal, okra, and chickpea) on the biological aspects (lifetime, developmental period) of P. gossypiella. Results Results revealed that the shortest larval time of P. gossypiella was observed on the okra feed diet while the longest period was recorded on the wheat germ diet. Meanwhile, the pupation delay was noted on the wheat germ diet. The dietary influence was also observed on adult stages of female and male P. gossypiella (43.00 and 37.50 days respectively) and compared with a standard diet (56.50 and 52.50 days respectively). Furthermore, larval weighed more on the okra and chickpea diet followed by the wheat germ diet, whereas highest pupal weight was observed on the standard diet followed by the chickpea diet and okra diet. Conclusion Developmental parameters were significantly variant across all treatment diets, whereas the higher significant difference was reported on the okra diet. Therefore, the existing data of this study offers fruitful interventions for the future as a modified diet for large-scale and rapid mass production of P. gossypiella larvae.

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