Description : … Granary Weevils . Various neem products were compared with copra oil, palm oil and 0.25% diazinon dust for protection of stored maize against the grain weevil, Sitophilus zeamais Motsch. Eucryptorrhynchus scrobiculatus is a major pest of tree of heaven, Ailanthus altissima, in China. The presence of normal serum levels of ALT, AST, alkaline phosphatase, and creatinine; normal liver and kidney structures; and normal weight gains in the animal groups fed basal diet (control) and basal diet plus 25% D. tripetala is a strong indication that 25% D. tripetala seed powder (1446.25 mg/kg) supplementation is not toxic to the liver and kidney and therefore supports normal organ functions. Conference Proceedings and Presentations. © 2008-2020 ResearchGate GmbH. January 2008; 338; ABI/ INFORM Global, 52. ment of the susceptibility of some varieties of, Evaluation of certain plant leaf powders and aqueous extracts against. As a remedy to control of these … This reduces the nutritional value, germination capacity, grain weight and marketability of such grains. L.) varieties grain for tolerance against maize weevil. Losses from legal maximum dosage constraints are calculated, as well as potential benefits to growers' profits from applying the results of this research. xiii control the maize weevils, followed by physical disturbance and then maize-amaranth mixture. Repellency effect was also conducted at 6, 12, and 24 h. The number of weevil death increased significantly as exposed time was increased. %PDF-1.4 In Ethiopia, like in other developing countries post harvest losses, including storage losses is estimated at 5-26%. the plant material should be tested at economically justified doses. (pepper fruit) seed either as powder or extract (1.5% w/w, ). In a bid to check their destructive activity, the leaves of three plants: Jatropha curcas, Citrus sinensis and Psidium guajava which are known to have medicinal properties were used to admix maize grains at 0.1 g, 0.2 g, 0.3 g, 0.5 g and 1.0 g dosages per 50 g of maize. International Journal of Tropical Insect Science. under optimal conditions of 27 to 31oC and 40 to 75% R.H., the maize weevil’s life cycle takes 5 to 8 weeks to complete [13, 14]. The larger grain borer Prostephanus truncatus Horn and the maize weevil Sitophilus zeamais Motschulsky are important pests of stored maize in the tropics, particularly where maize is stored on-farm with little control of moisture content and without use of pesticides. zeamais. , Motsch. It is clear that a lot of, the plant material (important for other purposes) will go into con-. Maize Weevil: Scientific Name: Sitophilus zeamais: Size: 1/8- to 3/16-inch long .The maize weevil is similar to the rice weevil, but larger Accessed 26 September 2007. ). Moisture con-, tent above 16 per cent renders maize varieties susceptible to infesta-, the need for grain conditioning before storage. The scale is receiving increased, attention and applied to rate maize varieties for resistance to the, Planting resistant varieties/cultivars is one of the most effective, eco-, nomical, and safe options to minimize dependence on pesticides in, tant information that will be considered during maize breeding pro-, new ndings that will assist the successful breeding of resistant cul-, grain has been identied in a recent study by, Even though there is dearth of information on the issue, the at side, it was suggested that breeders could manipulate the maize grain to, reduce surface area and size as well in order to help to cope with. Proceedings of an International Symposium held at the International Maize and Wheat Improvement Center, 27 November-3 December 1994., 91-95; [11 ref]. Eggs are laid within individual kernels, and the … Possible future research can be to: Investigate the possible causes and how to eliminate and/or minimize maize … Increases in maize varietal crude fibre, phenolic acid and trypsin inhibitor increased significantly mortality of _S. doubt that some progress has been made in the international concerted, effort to combat weevil infestation in stored maize—however, tation of research focus to abate the challenges offered by the notorious. /Title (�� M a i z e \( g r e a t e r g r a i n \) w e e v i l \( 3 3 9 \)) Journal of Economic Entomology, 92(1):239-245; 31 ref. zeamais_ attack. … 1 Department of Crop Production and Forest Resource Management, Kwara State University, Malete, Kwara State, Nigeria . European and Mediterranean. /Filter /DCTDecode How will the plant with, the highest efcacy be identied among test plants given that one, would have measured about four indices (mortality of adult, tive materials for active ingredients responsible for the insecticidal, action observed. (Coleoptera: Curculionidae) in Jos. Hermetic storage is the best among the researched methods to effectively . Use of botanicals to suppress the development of maize weevil, Sitophilus … C. sinensis caused insect mortality of 23% within 4 weeks while P. guajava caused 20.5% mortality of the weevils within the same period. The tropical convergent zone in particular is highly, variable with varying degrees of temperature and relative humid-, ity at any given time depending on the location. However, breeding maize crop to improve resistance against the maize weevil is associated with some technical limitations. … Effect of plant powders on maize weevil’s mortality The toxic effect of plants on adult of S. zeamais was accomplished in jars (20 cm diameter) containing 200 g of maize grains with dose of 2, 5, 8, and 11% (w/w) of plant powders. Some features of this site may not work without it. Eighty-five percent of the elite maize varieties were at least resistant to _S. Experiments were conducted to find out the role of maize weevil, Sitophilus zeamais Motsch. The LD50 recorded strongly indicates that D. tripetala has a moderately high safety margin. The current state of affairs shows that hunger is prevalent in countries of the world marked by violence and internal discord and in countries compromised agriculturally, technologically, economically and politically. takes into account not only the factors operating after oviposition, but with the inclusion of oviposition rate and seed weight loss as, indices of susceptibility to insect pest. Maize weevil (Sitophilus zeamais) is a cosmopolitan insect and causes great damage to stored grains. More materials are being tested to ght the weevil and, ). A model of pest control decisionmaking is generalized to permit choice of materials, timing, number of applications, and dosage rates. If such remnant eggs are not sterilized, they, will cause bias to the experiment, although this depends on time, between experiments and insect species in question. Motshulsky infestation on seven varieties of maize. /ColorSpace /DeviceRGB Exposing grains to, tropical ambient sun or air-temperature and relative humidity for, 2–4 weeks (drying or acclimatization) conditions maize grains for, storage in order to check weevil infestation. analyses, maize grain is a staple part of man and his environment. @inproceedings{Yusuf2020CharacterizationOB, title={Characterization of Bacteria from the Gut of Sitophilus zeamais (Maize Weevil)}, author={Shamtau D. Yusuf and N. PeniD. In addition, identifying and synthesizing the, active ingredients into commercially available insecticides have been, Since the use of chemicals in grain protection is inseparably, ance or tolerance is absent in the local maize varieties, concerned, bodies have been working and improving the genetic resistance of, maize varieties to storage pests since 1956 (, Since then, new maize varieties and cultivars that confer some level, of resistance to weevils and constitute eco-friendly option have been, released and conrmed. EPPO standards – efcacy evaluation of, plant protection products – No PP1/225(1). Its biology was previously reported by Longstaff2. Infestations can start in the field, but most damage occurs in storage. ... Ayertey (2002) reported total destruction of stored maize by P. truncatus in particular cob stored maize and cassava, which the insect can reduce to powder in few months. This assertion is not. The untreated control, trols have the capacity to provide insight into major overall changes, in pest populations or on the development of the pest (, moted here for inclusion in efcacy trials of plant materials com-, pares the effect produced by the plant material and obviously checks, of a reference plant protection insecticide during screening of plant, materials for insecticidal activity is a weakness that should not be, overlooked. Curculionidae) under laboratory conditions. Management of Maize Weevil (Sitophilus zeamais) Using Different Grain Protectants S.A. Hakeem, R.A. Wani*, B.A. (���ZJ (�� (�� * �ֿ�Ƨ�&� Z� � �~�� �?�����EQ!ERE-��~+i�����u�2����v-�}��.OA��H ers, and households are well-advised to adopt proper hygienic prac-, tices. The study identified crude fibre, phenolic acid and trypsin inhibitor of whole-maize grain as the bases for resistance. holder farmers in Kenya: a review based on swot analysis. 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