النشاط اليومي لبعض الملقحات المحلية لمحصول البرسيم Trifolium alexandrinum L. في محافظة القادسية

Abstract

The aims of the present study are to identified the native pollinators of Trifolium alexandrinum L. Clover field and to determine their daily activities for three months April, May and June/2010 in Al-qadisiya governorate.Elven species of wild bee and other insect were recorded on the flower of the crop which are four species from hymenoptera ,Apis melifera ; Megachil sp.; Halictus sp.; Anderena sp; and three species of diptera its Metasyrphus taeniops; Eristalis anaeus; Episyphus balteatus ; and four species from Lepidoptera it were Lycaeides Melissa(alpime); Autograph gamma L; Colias croceus (L.); and finally Artogeia rapa. The density of insect species were different according to the different time and insect species, Results showed that total mean of insect density were higher levels in May month at 12pm as it reached 768 idividual/m2,but lower level of the total mean density in April at 7pm as it reached 81 idividual/m2.Megachil sp was larger density mean reached 892 idividual/m2. but Episyrphus balteatus of diptera species was formed 435 idividual/m2.but types of Lepidoptera species such as Colias croceus(L.) was formed 730 idividual/m2.resuts appear that bee pollinators species Apis melifera , Megachil sp.; Halictus sp. and; Anderena sp, These four species contained 13.76, 8.23, 6.34, 3.73 flower/min of the total ratio of visiting means respectively. In diptera species especially Metasyrphus taeniops, Episyrphus balteatus were formed similar levels of visiting means for three time.but hn Lepidoptera species such as Colias croceus(L.) was increasing of visiting means at 5pm to reach 11.95 flower/min of one meter squares. This result showed to different appears of species due to different time of same day.the optimal activity of bee and some diptera species were in 7am- 12pm, but the optimal activity of Lepidoptera species was in 5 pm.