PRELIMINARY STUDIES ON NATURAL ENEMIES OF THE ALFALFA WEEVIL HYPERA POSTICA (GYLLENHALL), IN YASOUJ

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SAEEDI K.

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Journal: JOURNAL OF RESEARCH IN AGRICULTURAL SCIENCE Year:2007 | Volume:3 | Issue:1 Page(s): 1-13

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Title

PRELIMINARY STUDIES ON NATURAL ENEMIES OF THE ALFALFA WEEVIL HYPERA POSTICA (GYLLENHALL), IN YASOUJ

Author(s)

SAEEDI K. | Issue Writer Certificate

Keywords

ALFALFA WEEVILQ3

YASOUJQ3

NATURAL ENEMIESQ3

CURCULIONIDAEQ3

COLEOPTERAQ3

Abstract

Research was conducted in YASOUJ alfalfa fields during years 1997 - 99 to identify the NATURAL ENEMIES and pathogenic agents of the ALFALFA WEEVIL, Hypera postica (Gyll.), (Col.:Curculionidae) and the following species were identified:1-The parasitoid wasp, Anaphes = (Patasson) sp. In the course of investigation, this parasitoid wasp caused a mean of parasitism of 3.1% on the eggs in the alfalfa fields.2-The parasitoid wasp, Bathyplectes sp. Thorn. During 1997 - 99, this parasitoid wasp caused a mean of parasitism 30.5% on the larval instars of the ALFALFA WEEVIL in the alfalfa fields.3-The predatory bug, Geocoris megacephalus. This predatory bug was observed in some alfalfa fields feeding on the first larvae instars of the ALFALFA WEEVIL, but its density was very low. In laboratory rearing each predatory bug consumed an average of 1.1 ALFALFA WEEVIL first instar larval.4-The predatory bug, Nabis sp. This predatory bug was consumed of larval instars of the ALFALFA WEEVIL. The population density of this predator in-the alfalfa fields was low. 5- Chrysoperla carnea The population density of this predator in the alfalfa fields was low prior to June in three years (1997-99), but was increased gradually.6-The lady birds, Coccinella septempunctata L. The population density of this predator in the alfalfa fields in three years was increased gradually from June. The adult and larvae of this predator consumed of eggs and larvae of the ALFALFA WEEVIL.7-The pathogenic fungus, Beauveria bassiana (Bals.). This fungus caused a mean mortality of 38.1% on the overwintering adult ALFALFA WEEVIL in the alfalfa fields. Under the laboratory condition an average of 86% adult, 56% larvae and 38.5% of the pupae were killed by the pathogen after artificial inoculations. It is therefore, recommended to conduct more research on the effectivness of the spore dusting of the B. bassiana into the alfalfa fields after the harvest to control overwintering adults. Also mass rearing and release of the C. carne a in the spring should be investigated as a potential nonchemical control method. After confirmation of the effectiveness of these control measures in the fields studies they can be used in an I.P.M program of the ALFALFA WEEVIL, in the YASOUJ region.

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APA: Copy

SAEEDI, K.. (2007). PRELIMINARY STUDIES ON NATURAL ENEMIES OF THE ALFALFA WEEVIL HYPERA POSTICA (GYLLENHALL), IN YASOUJ. JOURNAL OF RESEARCH IN AGRICULTURAL SCIENCE, 3(1), 1-13. SID. https://sid.ir/paper/115247/en

Vancouver: Copy

SAEEDI K.. PRELIMINARY STUDIES ON NATURAL ENEMIES OF THE ALFALFA WEEVIL HYPERA POSTICA (GYLLENHALL), IN YASOUJ. JOURNAL OF RESEARCH IN AGRICULTURAL SCIENCE[Internet]. 2007;3(1):1-13. Available from: https://sid.ir/paper/115247/en

IEEE: Copy

K. SAEEDI, “PRELIMINARY STUDIES ON NATURAL ENEMIES OF THE ALFALFA WEEVIL HYPERA POSTICA (GYLLENHALL), IN YASOUJ,” JOURNAL OF RESEARCH IN AGRICULTURAL SCIENCE, vol. 3, no. 1, pp. 1–13, 2007, [Online]. Available: https://sid.ir/paper/115247/en

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