scholarly journals Conocimiento y percepción tsotsil sobre los insectos perjudiciales de la milpa en la reserva de la biosfera Selva El Ocote (Chiapas, México)

2018 ◽  
Vol 52 ◽  
pp. 255 ◽  
Author(s):  
Esperanza López de la Cruz ◽  
Lorena Ruíz Montoya ◽  
Benigno Gómez y Gómez ◽  
Adriana Elena Castro Ramírez ◽  
María Silvia Sánchez Cortés
Keyword(s):  
Helicoverpa Zea ◽  
La Milpa

El presente estudio se desarrolló en dos comunidades tsotsiles, pertenecientes a la familia lingüística maya, con el objetivo de determinar los conocimientos y las percepciones de los agricultores sobre los insectos perjudiciales de la milpa. Con base en un enfoque cualitativo, la información se recopiló mediante entrevistas, visitando parcelas y un taller en cada comunidad. Los vocablos que se utilizan para referirse a los insectos y otros artrópodos son bik¢tal chonetik y chanul, para referirse a los que perjudican a sus cultivos agregan el término slajes. Se reconocieron 19 insectos perjudiciales para la milpa, dos de los cuales (Atta mexicana y Helicoverpa zea) son a la vez comestibles. Los agricultores identificaron que la presencia y abundancia de insectos se relaciona con factores como la sequia. El escaso conocimiento sobre los ciclos de vida y enemigos naturales de los insectos puede obstaculizar los esfuerzos para un control biológico de insectos plaga.

scholarly journals Genetic Mechanisms Underlying Apimaysin and Maysin Synthesis and Corn Earworm Antibiosis in Maize (Zea mays L.)

Genetics ◽  
1998 ◽  
Vol 149 (4) ◽  
pp. 1997-2006
Author(s):  
E A Lee ◽  
P F Byrne ◽  
M D McMullen ◽  
M E Snook ◽  
B R Wiseman ◽  
...  
Keyword(s):  
Helicoverpa Zea ◽  
Larval Growth ◽  
Corn Earworm ◽  
Phenotypic Variance ◽  
Significant Qtls ◽  
F2 Population ◽  
Genetic Mechanisms ◽  
Trait Locus ◽  
Maize Silks ◽  
Related Compounds

Abstract C-glycosyl flavones in maize silks confer resistance (i.e., antibiosis) to corn earworm (Helicoverpa zea [Boddie]) larvae and are distinguished by their B-ring substitutions, with maysin and apimaysin being the di- and monohydroxy B-ring forms, respectively. Herein, we examine the genetic mechanisms underlying the synthesis of maysin and apimaysin and the corresponding effects on corn earworm larval growth. Using an F2 population, we found a quantitative trait locus (QTL), rem1, which accounted for 55.3% of the phenotypic variance for maysin, and a QTL, pr1, which explained 64.7% of the phenotypic variance for apimaysin. The maysin QTL did not affect apimaysin synthesis, and the apimaysin QTL did not affect maysin synthesis, suggesting that the synthesis of these closely related compounds occurs independently. The two QTLs, rem1 and pr1, were involved in a significant epistatic interaction for total flavones, suggesting that a ceiling exists governing the total possible amount of C-glycosyl flavone. The maysin and apimaysin QTLs were significant QTLs for corn earworm antibiosis, accounting for 14.1% (rem1) and 14.7% (pr1) of the phenotypic variation. An additional QTL, represented by umc85 on the short arm of chromosome 6, affected antibiosis (R2 = 15.2%), but did not affect the synthesis of the C-glycosyl flavones.

Control of Helicoverpa zea in Tomatoes with Chlorantraniliprole Applied Through Drip Chemigation

2010 ◽  
Vol 11 (1) ◽  
pp. 21 ◽  
Author(s):  
Thomas P. Kuhar ◽  
James F. Walgenbach ◽  
Hélène B. Doughty
Keyword(s):  
North Carolina ◽  
Helicoverpa Zea ◽  
Field Trials ◽  
Single Application ◽  
Beneficial Arthropods ◽  
Worker Exposure ◽  
Anthranilic Diamide ◽  
Mammalian Toxicity ◽  
Tomato Fruitworm ◽  
Reduced Risk

Chlorantraniliprole (=Rynaxypyr) is a novel anthranilic diamide insecticide that is of interest to vegetable growers because of its low mammalian toxicity and systemic properties. Field trials were conducted between 2006 and 2008 in North Carolina and Virginia to test the efficacy of chlorantraniliprole as a drip chemigation treatment on tomatoes. Drip chemigation of chlorantraniliprole at various rates and intervals significantly reduced the percentage of tomatoes damaged by tomato fruitworm (Helicoverpa zea) comparable to that typically achieved from multiple foliar applications of insecticides. The best control was achieved with two applications of chlorantraniliprole at 0.074 kg ai/ha, or a single application at 0.099 kg ai/ha. Residual ingestion bioassays showed that chlorantraniliprole was effectively taken up by the roots and was active in leaves up to 66 days after treatment (DAT), active in blossoms up to 22 DAT, but was not active in fruit. Drip chemigation of chlorantraniliprole may offer several advantages over foliar applications, including ease of application, reduced pesticide input into the environment, reduced worker exposure to pesticides, and reduced risk to beneficial arthropods. Accepted for publication 14 January 2010. Published 7 April 2010.

Attraction of Heliothis belladonna (Henry and Edwards) to the Sex Pheromone of the Corn Earworm Moth, Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae)

2006 ◽  
Vol 79 (4) ◽  
pp. 303-308 ◽  
Author(s):  
Peter J. Landolt ◽  
Constance L. Smithhisler ◽  
Richard S. Zack ◽  
Leonardo Camelo
Keyword(s):  
Sex Pheromone ◽  
Helicoverpa Zea ◽  
Corn Earworm ◽  
Lepidoptera Noctuidae

scholarly journals Growth of a clonal cell line of Helicoverpa zea (Lepidoptera: Noctuidae) in suspension culture and replication of its homologous baculovirus HzSNPV.

2001 ◽  
Vol 36 (3) ◽  
pp. 349-352 ◽  
Author(s):  
Arthur H. McIntosh ◽  
James J. Grasela ◽  
Cynthia L. Goodman ◽  
Carlo M. Ignoffo
Keyword(s):  
Suspension Culture ◽  
Cell Line ◽  
Helicoverpa Zea ◽  
Clonal Cell Line ◽  
Clonal Cell ◽  
Lepidoptera Noctuidae

Receptor-mediated endocytosis of storage proteins by the fat body of Helicoverpa zea

1994 ◽  
Vol 278 (1) ◽  
pp. 107-115 ◽  
Author(s):  
Zhixiang Wang ◽  
Norbert H. Haunerland
Keyword(s):  
Helicoverpa Zea ◽  
Storage Proteins ◽  
Fat Body ◽  
Receptor Mediated Endocytosis
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