Control of Sitophilus zeamais and Rhizopertha dominica by pre-harvest sprays and sack treatment with three insecticides in three sorghum varieties

Carino, F.O. and Morallo-Rejesus, B. (1976) Control of Sitophilus zeamais and Rhizopertha dominica by pre-harvest sprays and sack treatment with three insecticides in three sorghum varieties. Philippine Agriculturist, 60 (3-4). pp. 81-95.

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Abstract

In the Philippines, several varieties of sorghum were examined in the field and in the storehouse for damage by insect pests normally occurring during storage. Sitophilus zeamais Motsch. and Rhyzopertha dominica (F.) were observed in the field up to 28 days before harvest, and these and Tribolium castaneum (Hbst.) were the principal pests during storage. Spraying the sorghum plants with tetrachlorvinphos, pirimiphos-methyl or malathion before harvest in the dry and wet seasons permitted the resulting grain to be stored for 3 and 2 months, respectively, without further treatment during storage, the first compound giving the most protection against insects and the last compound the least. Grain sprayed before harvest that was afterwards stored in sacks impregnated with the insecticides mentioned was protected from insect infestation for longer (about 6 months) than was sprayed grain stored in untreated sacks or unsprayed grain stored in treated sacks. During field or storehouse attacks, the beetles consistently preferred 2 of the tested sorghum varieties to the third.ADDITIONAL ABSTRACT:In the field and in storage, both insects preferred Cosor 1 to Cosor 2 or Cosor 3, possibly because of the harder endosperm of Cosor 2 and 3 and the higher protein content of Cosor 1

Item Type: Article
Author Affiliation: Department of Entomology, College of Agriculture, University of the Philippines at Los Banos, Luzon, Philippines
Subjects: Plant Protection
Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 20 Sep 2012 10:54
Last Modified: 20 Sep 2012 10:56
URI: http://eprints.icrisat.ac.in/id/eprint/8013

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