Managing Icerya purchasi and Planococcus citri menace in Aonla under rainfed conditions of Jammu subtropics

2022 ◽  
Author(s):  
Reena Sinha ◽  
Anil Kumar ◽  
Jai Kumar ◽  
B. K. Sinha ◽  
Sonika Jamwal ◽  
...  
Keyword(s):  
Planococcus Citri ◽  
Icerya Purchasi ◽  
Rainfed Conditions

Effect of Biochar on Maize Yield and Yield Components in Rainfed Conditions

2018 ◽  
Author(s):  
Zafar Ullah ◽  
Muhammad Shahbaz Akmal ◽  
Muzaffar Ahmed ◽  
Mohammed Ali ◽  
Aurangzaib Zaib Khan ◽  
...  
Keyword(s):  
Yield Components ◽  
Maize Yield ◽  
Yield And Yield Components ◽  
Rainfed Conditions

scholarly journals Desenvolvimento de Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) em cafeeiros

2009 ◽  
Vol 31 (1) ◽  
Author(s):  
Lenira Viana Costa Santa-Cecília ◽  
Lílian Roberta Barbosa Correa ◽  
Brígida Souza ◽  
Ernesto Prado ◽  
Eliana Alcantra
Keyword(s):  
Planococcus Citri

scholarly journals Paclobutrazol Improves Sesame Yield by Increasing Dry Matter Accumulation and Reducing Seed Shattering Under Rainfed Conditions

2021 ◽  
Author(s):  
Muhammad Zeeshan Mehmood ◽  
Ghulam Qadir ◽  
Obaid Afzal ◽  
Atta Mohi Ud Din ◽  
Muhammad Ali Raza ◽  
...  
Keyword(s):  
Leaf Area ◽  
Seed Production ◽  
Seed Yield ◽  
Dry Matter ◽  
Biomass Accumulation ◽  
Total Biomass ◽  
Dry Matter Accumulation ◽  
Seed Shattering ◽  
Rainfed Conditions ◽  
Leaf Greenness

AbstractSeveral biotic and abiotic stresses significantly decrease the biomass accumulation and seed yield of sesame crops under rainfed areas. However, plant growth regulators (such as Paclobutrazol) can improve the total dry matter and seed production of the sesame crop. The effects of the paclobutrazol application on dry matter accumulation and seed yield had not been studied before in sesame under rainfed conditions. Therefore, a two-year field study during 2018 and 2019 was conducted with key objectives to assess the impacts of paclobutrazol on leaf greenness, leaf area, total dry matter production and partitioning, seed shattering, and seed yield of sesame. Two sesame cultivars (TS-5 and TS-3) were treated with four paclobutrazol concentrations (P0 = Control, P1 = 100 mg L−1, P2 = 200 mg L−1, P3 = 300 mg L−1). The experiment was executed in RCBD-factorial design with three replications. Compared with P0, treatment P3 improved the leaf greenness of sesame by 17%, 38%, and 60% at 45, 85, and 125 days after sowing, respectively. However, P3 treatment decreased the leaf area of sesame by 14% and 20% at 45 and 85 days after sowing than P0, respectively. Compared with P0, treatment P3 increased the leaf area by 46% at 125 days after sowing. On average, treatment P3 also improved the total biomass production by 21% and partitioning in roots, stems, leaves, capsules, and seeds by 23%, 19%, 23%, 22%, and 40%, respectively, in the whole growing seasons as compared to P0. Moreover, under P3 treatment, sesame attained the highest seed yield and lowest seed shattering by 27% and 30%, respectively, compared to P0. This study indicated that by applying the paclobutrazol concentration at the rate of 300 mg L−1 in sesame, the leaf greenness, leaf areas, biomass accumulation, partitioning, seed yield, and shatter resistance could be improved. Thus, the optimum paclobutrazol level could enhance the dry matter accumulation and seed production capacity of sesame by decreasing shattering losses under rainfed conditions.

Legume–barley intercropping stimulates soil N supply and crop yield in the succeeding durum wheat in a rotation under rainfed conditions

2015 ◽  
Vol 89 ◽  
pp. 150-161 ◽  
Author(s):  
Antonella Scalise ◽  
Demetrio Tortorella ◽  
Aurelio Pristeri ◽  
Beatrix Petrovičová ◽  
Antonio Gelsomino ◽  
...  
Keyword(s):  
Durum Wheat ◽  
Crop Yield ◽  
Soil N ◽  
N Supply ◽  
Rainfed Conditions

Facultative heterochromatization in parahaploid male mealybugs: involvement of a heterochromatin-associated protein

Development ◽  
2001 ◽  
Vol 128 (19) ◽  
pp. 3809-3817 ◽  
Author(s):  
Silvia Bongiorni ◽  
Milena Mazzuoli ◽  
Stefania Masci ◽  
Giorgio Prantera
Keyword(s):  
Monoclonal Antibody ◽  
Drosophila Melanogaster ◽  
Constitutive Heterochromatin ◽  
Planococcus Citri ◽  
Chromosomal Protein ◽  
Paternal Chromosome ◽  
Localization Pattern ◽  
Males And Females ◽  
Male Specific ◽  
Nonhistone Chromosomal Protein

The behavior of chromosomes during development of the mealybug Planococcus citri provides one of the most dramatic examples of facultative heterochromatization. In male embryos, the entire haploid paternal chromosome set becomes heterochromatic at mid-cleavage. Male mealybugs are thus functionally haploid, owing to heterochromatization (parahaploidy). To understand the mechanisms underlying facultative heterochromatization in male mealybugs, we have investigated the possible involvement of an HP-1-like protein in this process. HP-1 is a conserved, nonhistone chromosomal protein with a proposed role in heterochromatinization in other species. It was first identified in Drosophila melanogaster as a protein enriched in the constitutive heterochromatin of polytene chromosome. Using a monoclonal antibody raised against the Drosophila HP-1 in immunoblot and immunocytological experiments, we provide evidence for the presence of an HP-1-like in Planococcus citri males and females. In males, the HP-1-like protein is preferentially associated with the male-specific heterochromatin. In the developing male embryos, its appearance precedes the onset of heterochromatization. In females, the HP-1-like protein displays a scattered but reproducible localization pattern along chromosomes. The results indicate a role for an HP-1-like protein in the facultative heterochromatization process.

scholarly journals La situación de las annonaceae en México: principales plagas, enfermedades y su control

2014 ◽  
Vol 36 (spe1) ◽  
pp. 44-54 ◽  
Author(s):  
Librado Vidal Hernández ◽  
Héctor López Moctezuma ◽  
Nayelli Ayatzol Vidal Martínez ◽  
Romeo Ruiz Bello ◽  
Doris Guadalupe Castillo Rocha ◽  
...  
Keyword(s):  
Colletotrichum Gloeosporioides ◽  
Planococcus Citri ◽  
Fusarium Sp

La importancia económica de las especies de la familia Annonaceae en México es diversa y no se restringe a las especies comestibles, pues además incluye especies con propiedades aromáticas para la extracción de aceites esenciales, medicinales, insecticidas y tóxicos a peces. En general esta familia no se ha formalizado agronómica ni económicamente, sin embargo, presenta grandes perspectivas dentro de programas de mejoramiento genético, en el uso como portainjertos o bien como cultivos alternativos. Las principales plagas asociadas al género Annona son: Bephratelloides cubensis Ashmead, Cerconota anonella Sepp., Corythuca gossypii Fab., Planococcus citri, Chrysobotris sp., Talponia batesi Heinrich., Acantocephala femorata Fab.. Las principales enfermedades de las anonáceas reportadas son: Colletotrichum gloeosporioides Penz, Rhizopusstolonifer Ehr., Phyllosticta sp., Pestalotia sp., Macrophoma sp., Fusarium sp y Phytopthora sp.. Siendo la primera la principal enfermedad de mayor importancia en el cultivo del guanábano dado que disminuye el rendimiento y calidad de los frutos. En chirimoyo y guanábano es muy poca la información bibliográfica existente sobre plagas y enfermedades, y en las demás especies de Annona es nula. No se han realizado evaluaciones de las pérdidas que ocasionan las plagas y enfermedades en las Anonáceas, ocasionando un desconocimiento pleno sobre los daños ocasionados por este factor biótico.

scholarly journals Parasitismo da cochonilha-farinhenta Planococcus citri (Hemiptera: Pseudococcidae) por Coccidoxenoides perminutus (Hymenoptera: Encyrtidae) 1

Revista CERES ◽  
2017 ◽  
Vol 64 (5) ◽  
pp. 486-491
Author(s):  
Karen Oliveira de Menezes ◽  
Maria Herlândia de Araújo Fernandes ◽  
Huanna Húbia Rodrigues Paz ◽  
Adriana Maria de Souza ◽  
Jorge Braz Torres ◽  
...  
Keyword(s):  
Planococcus Citri

RESUMO Planococcus citri é uma importante praga da videira, no submédio do Vale do São Francisco, e seu parasitismo por Coccidoxenoides perminutus, de ocorrência natural nesta região, foi estudado por meio da determinação dos parâmetros de resposta funcional. O experimento foi conduzido com ninfas de segundo ínstar dessa cochonilha, ofertadas nas densidades de 2, 4, 8, 14, 28, 40 e 50, empregando discos de folhas de videira (cv. Syrah). Fêmeas recém-emergidas e alimentadas do parasitoide foram confinadas com as ninfas por 24h. A taxa de parasitismo resultou em resposta funcional do tipo III, com os parâmetros tempo de manipulação (Th) e taxa de ataque (a’) de 0,9824h e 0,00718h-1, respectivamente. Observou-se correlação de 94,3% entre o parasitismo observado e o estimado pelo modelo de resposta funcional, com máximo de 27 e 24,44 ninfas parasitadas em 24h, respectivamente. A emergência de parasitoides de ninfas mumificadas variou entre 64 e 95%, em função das densidades estudadas. Os resultados mostraram que a resposta funcional de C. perminutus em ninfas de P. citri é do tipo III e que a taxa de emergência do parasitoide é influenciada pelas diferentes densidades de ninfas de P. citri oferecidas. Com base na resposta funcional determinada, C. perminutus apresenta potencial de controle da praga, contribuindo com informações para um futuro programa de controle biológico.

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