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The effect of various temperature treatments on the development of Megachile minutissima in Egypt [electronic resource].

By:

Kamel, S. M

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Language: English Description: p.101-108Uniform titles:

Agricultural research journal, Suez Canal University, 2012 v.12(1) [electronic resource].

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In: Agricultural Research Journal, Suez Canal University 2012 v.12(1)Summary: Laboratory experiments were conducted as an attempt to break the prepupal diapause of this insect pollinator, in order to control adult emergence to be synchronized with the expected time of flowering seasons of alfalfa crop. Regarding the effect of incubation temperature on post-diapause developmental stages of M. minutissima, results indicated that the shortest period of incubation at 30±0.4°C needed for breaking prepupal diapause to initiate the subsequently developmental stages of M. minutissima was about 12 days for pupal stage, and 19 days for adult stage of both males and females, while the longest period lasted about 26 days for each of pupae, males and females. The percentage of emerged adults of M. minutissima was 60% for the 152 days cold store, and gradually decreased with the increase of the cold storage period in 2009. Meanwhile, the percentage of emerged adults ranged between 40-60% for all cold storage periods in 2010. The sex ratio of emerged bees was 1.7♀:1♂.

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Laboratory experiments were conducted as an attempt to break the prepupal diapause of this insect pollinator, in order to control adult emergence to be synchronized with the expected time of flowering seasons of alfalfa crop. Regarding the effect of incubation temperature on post-diapause developmental stages of M. minutissima, results indicated that the shortest period of incubation at 30±0.4°C needed for breaking prepupal diapause to initiate the subsequently developmental stages of M. minutissima was about 12 days for pupal stage, and 19 days for adult stage of both males and females, while the longest period lasted about 26 days for each of pupae, males and females. The percentage of emerged adults of M. minutissima was 60% for the 152 days cold store, and gradually decreased with the increase of the cold storage period in 2009. Meanwhile, the percentage of emerged adults ranged between 40-60% for all cold storage periods in 2010. The sex ratio of emerged bees was 1.7♀:1♂.

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