SVIBOR - Project code: 4-99-175

MINISTRY OF SCIENCE AND TECHNOLOGY

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Project code: 4-99-175

INTEGRATED MEASURES OF PROTECTION OF STORED AGRICULTURAL PRODUCTS

Main researcher: KORUNIĆ, ZLATKO (22291)

Assistants

KAJIĆ, VESNA (115081)
HRLEC, GORAN (16632)
PAGLIARINI, NEDA (34564)
ŠPOLJARIĆ, JOSIP (47976)
MIKEC, IVAN (30964)
JELKOVIĆ, DARKO (104981)
FLEGAR, ZVONIMIR (198074)
HAMEL, DARKA (104992)

Type of research: applied
Duration from: 01/01/93. to 12/31/95.

Papers on project (total): 21

Institution name: Zavod za zaštitu bilja u poljoprivredi i šumarstvu RH, Zagreb (1055)

Communication: Fax: 385 (0)41-211-640; Fax: 385 (0)41-211-842; Phone: 385 (0)41-223-260; Phone: 385 (0)41-235-753

Summary: In the first year (1993) of investigations experiments are conducted at two fields: a) tests with the natural insecticide diatomaceous earth ( DE); and b) tests with CO2. The efficacy of the 4 DE formulations of marine origin are investigated: Insecolo, Insecto, Celite 209 and Celite 209 heated. The species tested were: Cryptolestes ferugineus ( Stephens), Tribolium castaneum ( Herbst), Rhizopertha dominica ( Fabricius ) i Sitophilus oryzae ( Linnaeus ). There were no differences in the efficacy of the 4 DE formulations against four tested species. The most sensitive species was C.ferrugineus, with over 99% mortality after 1 day at 1000 ppm or after 7 days at 500 ppm. The second most sensitive species was S.oryzae, with 70% mortality after 7 days at 1000 ppm. R.dominica had only 22% mortality after 7 days at 1000 ppm and T.castaneum had only 8% mortality ( See Graph 1 and 2 ). Western Red Spring Wheat ( Canada ) with a test weight of 77.7 (kg/hl) would have a reduced grade due to test weight reduction, even at 100 ppm ( Graph 3). The higher concentration, specially 1000 ppm, causes wheat to have a bleached appearance ( Fig 3) which would also reduce the grade.

Keywords: stored-products pests, diatomaceous earth, efficacy, wheat quality

Research goals: 1. To compare the efficacy of different formulations of marine diatomaceous earth ( DE) against four species of stored-product insects 2. To test the influence of DE on the quality of wheat 3. To discover and develop a diatomaceaus eart based insecticide that is acceptable to the grain industry

Other information about the project.


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