Studies on the Chemical Control of the Mirid Bug, Helopeltis Antonii Sign, in the Cashew View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1981-12

AUTHORS

K. Jeevaratnam, Rohan H. S. Rajapakse

ABSTRACT

Laboratory and field studies were made to investigate the toxicity, mode of action, and persistence of technical DDT and y BHC when applied to the cashew in Sri Lanka to control the mirid bug, Helopeltis antonii Sign. The insecticides were tested at concentrations previously used in field trials. Mirid nymphs were placed on the nuts and the rate of knockdown and mortality after exposure for a test period was recorded. These tests showed that BHC had a higher toxicity and acted more quickly than DDT. BHC had a powerful and transient fumigant action over DDT, which had no fumigant effect at all. Persistence was studied by treating cashew leaves and nuts growing under natural conditions and then testing the residual deposit at intervals. It was concluded that BHC would be more effective than DDT when treating mature cashews because, in addition to its higher toxicity and quicker action, its fumigant action would compensate for incomplete coverage by low-volume spraying. More... »

PAGES

399-402

Identifiers

URI

http://scigraph.springernature.com/pub.10.1017/s1742758400000758

DOI

http://dx.doi.org/10.1017/s1742758400000758

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1021085569


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