University of Khartoum

Effect of Storage Conditions and Botanicals on the Infestation of Seeds of Acacia nilotica (L, Will ex Del.) and A. seyal (Del) var seyal Brenan, by some Bruchids

Effect of Storage Conditions and Botanicals on the Infestation of Seeds of Acacia nilotica (L, Will ex Del.) and A. seyal (Del) var seyal Brenan, by some Bruchids

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Title: Effect of Storage Conditions and Botanicals on the Infestation of Seeds of Acacia nilotica (L, Will ex Del.) and A. seyal (Del) var seyal Brenan, by some Bruchids
Author: Abbas Ahmed El Sheikh, Mohamed
Abstract: Seeds of A. nilotica and A. .seyal are subjected to severe infestation by C. serratus in the tradition store, unless treated by benzine hexa chloride (BHC). However, SHC is internationally banned due to its hazards. This study was done to evaluate the effect of cold and cool storage conditions and some plant extracts (botanicals) on the development of the bruchid on the seeds of these species. An other objective of the study was to test the effect of these conditions and botanicals on the germination (%) of these seeds. Seeds of each species were randomly collected from known forests during March 1996 and 1997, respectively. Adults of C. serratus together with other stages were randomly collected with infested seeds of A. nilotica from Sennar forests seed store. These adults were then reared in plastic boxes and jute sacks. The experiments of the storage conditions were done in controlled cold and cool stores as well as the tradition store at the Tree Seed Centre (TSC) at Soba. The botanicals (oils or powders) were prepared and kept in the refrigerator. The experiments of the botanicals were done in a tradition store at the (TSC) at Damazin. The concentrations used were 1 %, 3% and 5% (W/W) for the powders; 0.1 %,0.3% and 0.5% (V/W) for the oils; 10%, 50% and 100% (V/W) for the volatile oil and 0.1 %,0.3% and 0.5% (WIW) for the (BHC). The control was left untreated (0%). The effect of storage conditions or the botanicals was studied on the egg laying, egg hatchability, cocoon formation, emergence and the mortality of adults of the bruchid. In each experiment samples of 100 grams seeds each were randomly taken from the freshly collected seeds and were put in clean glass jars. Adults (males and females), eggs and cocoons were also randomly taken from the rearing culture. Each experiment was replicated 5 times. Data was daily observed and recorded and then statistically analysed using (ANOVA) and (LSD). The results of the study indicated that both cold and cool stores had significantly (P<0.00) reduced egg laying, egg hatchability, cocoon formation and adult emergence of C. serratus on both kinds of seeds. Only the cold store was significantly increased adult mortality within 3 days. The results indicated that neem leaf powder and Eucalyptus leaf powder had no significant effect, while neem seed kennel powder, neem oil, sesame oil and Eucalyptus oil had significantly (P < 0.001) affected the different developmental stages of C. serratus on both kinds of seeds compared to the control (00/0) and gave more or less similar efficiency compared to (BHC). The results showed that both cold and cool storage conditions had no significant effect on the germination (%) of the seeds of both species compared to the control. Neem and sesame oils at 0.5 and 0.3% had significantly reduced the germination (%) of both kinds of seeds, while neem seed kernel powder and Eucalyptus oil at the two concentrations studied had no significant effect compared to the control. , The results were discussed compared to that of other studies and then concluded that cold and cool storage conditions as well as some of the botanicals had high efficiency against all the developmental stages of C. serratus on A. nilotica and A. seyal var. seyal seeds. Early collection of the seeds, storage of the seeds in cold and cool stores, use of some botanicals as natural pesticides instead of (BHC) and encouragement of the research in botanicals extraction and in forest protection were some of the recommendations.
URI: http://khartoumspace.uofk.edu/handle/123456789/13857
Date: 2015-06-22


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