effects of thrips (pseudodendrothrips mori niwa) infested mulberry leaves on silkworm growth and commercial cocoon parameters
نویسندگان
چکیده
in mulberry orchards in northern part of iran, thrips is a dominant pest and causing a lot of damage to the mulberry. the effect of pest on bio-chemical parameters of mulberry leaf of two varieties viz. kenmochi and ichenoise and also the effect of feeding of infested leaves on rearing performances have been studied. for the study, six plots of 200 m2 area of both the varieties were selected and three of them, of each variety, were sprayed with 0.5% metasystox at a peak period of occurrence of nymph population to obtain the good healthy leaf without thrips infestation. another 3 plots were left without pesticide spray to obtain infested leaves so as effect of infestation on chemical parameters of leaf and effect of infested leaves on rearing performance could be studied. during rearing, larvae were fed with good quality of mulberry leaf while another lot were fed with infested leaves. the results showed that there was a decrease in nitrogen, phosphorus, potassium and protein contents of leaves by 2.5, 10.8, 18.7 and 12.5%, respectively due to infestation and the decrease in these parameters was more in kenmochi. there was also a significant decrease in total cocoon production, cocoon weight, pupal weight, and shell weight due to feeding of infested leaves. however, there was no significant difference in shell ratio between the lots fed with healthy and infested leaves.
منابع مشابه
Effects of Thrips (Pseudodendrothrips mori Niwa) Infested Mulberry Leaves on Silkworm Growth and Commercial Cocoon Parameters
In mulberry orchards in northern part of Iran, thrips is a dominant pest and causing a lot of damage to the mulberry. The effect of pest on bio-chemical parameters of mulberry leaf of two varieties viz. Kenmochi and Ichenoise and also the effect of feeding of infested leaves on rearing performances have been studied. For the study, six plots of 200 m2 area of both the varieties were selected an...
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The occurrence of fringed wings insect, Pseudodendrothrips mori is a major pest of mulberry, which causes a considerable leaf yield loss and inturn damages its quality. Hence, an attempt was made to know the changes in biochemical constituents (Free amino acids, total soluble proteins, total reducing sugars, total soluble sugars, starch and total phenols) and photosynthetic pigments (total chlo...
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The present study has been aimed at investigating various Economic Parameters of the silkworm cocoon, when fed on mulberry leaves fortified with selected trace element Zinc, vitamin, Pyridoxine and hormone, Methoprene. The experimental worms were divided in to four groups and fed with mulberry leaves soaked in the selected compounds i.e. Zinc chloride, Pyridoxine, Methoprene and with Mixed dose...
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عنوان ژورنال:
caspian journal of environmental sciencesناشر: university of guilan
ISSN
دوره 4
شماره 1 2006
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