NOVEL THINKING

There was a distinct difference between the values of head capsule width for the successive larval instars.

Journal of Chemical Ecology, 19, 1393-1403. After a few weeks, an adult emerges from the pupal case and may immediately break free of the cocoon or wait within the cocoon for several days to weeks before emerging. Curculionidae Family, weevils .

Two weeks after larval infestation, endophytic B. bassiana significantly reduced larval survivorship (23.5–88.9%), resulting in 42.0–86.7% reduction of plant damage (Akello et al., 2008b). The growth ratio (Dyar’s ratio) varied across the larval instar stages ranging from 1.2 to 1.5, with the mean growth ratio of 1.3. Figure 7. London: HMSO.

0000005927 00000 n 0000005112 00000 n TZPB-SW-R), rice (var. & Nordenhem, H. 1993. common name: palmetto weevil scientific name: Rhynchophorus cruentatus Fabricius (Insecta: Coleoptera: Curculionidae) Introduction - Distribution - Description - Life Cycle - Host Range - Damage - Associations with Metamasius - Chemical Ecology - Management - Selected References Introduction (Back to Top). Pine weevil abundance on clear-cuttings of different ages: a 6-year study using pitfall traps. Many are considered pests, e.g.

Figure 13. Female lays on an average 360 eggs over a period of 24 days. Damage to Canary Island date palm by larvae of the palmetto weevil, Rhynchophorus cruentatus Fabricius.

Sixty-eight plant species were screened and onlyS. Grub is small, white apodous and found feeding on roots. Cite as. The mean total instar larval developmental period of maize weevil was 23.1 22.2, 22.2, and 21.6 days on maize, rice, sorghum, and millet, respectively, showing that weevil larvae develop faster on millet than other cereals. The necrosis often interferes with the pathways for water and nutrient exchange within the plant. Graphic by Robin M. Giblin-Davis, University of Florida. Feeding bythe pine weevil. A method for trapping, Nordlander, G. 1990.

The impact of host plant species on the larval development of the large pine weevil, Thorsén, Å., Mattsson, S. & Weslien, J. Schmitt et al. 1954. Feeding activity in the pineweevil. All content is made freely available for non-commercial purposes, users are allowed to copy and redistribute the material, transform, and build upon the material as long as they cite the source. Life Cycle and Development of Coptoborus ochromactonus (Coleoptera: Curculionidae: Scolytinae), a pest of balsa Jessenia Castro,1 ,2 Sarah M. Smith,3 Anthony I. Cognato ,3 6 Dolly Lanfranco,2 Evidence of pheromone-mediated behaviour in the large pine weevil. 0000004415 00000 n Photograph by Lyle J. Buss, University of Florida. Emergence trap developed to capture adult large pine weevil, Moore, R., J.M. Le Dépérissement du Pin Mésogéenen Provence. In fact, the rostrum of some weevils (i.e., nut weevils) is as long as their bodies. Lindelöw, H., Eidmann, H.H. A linear relationship obtained between head capsule width and a high regression coefficient of 0.92 (on maize), 0.94 (on rice), 0.94 (on sorghum), and 0.98 (on millet) attested to the fact that no stadium was overlooked. Time of oviposition and its influence on the development of, Lempérière, G. 1999. Figure 12. S. zeamais has seven life stages comprising egg (), four larval instars (), prepupa/pupa (), and adult (). Photograph by Robin M. Giblin-Davis, University of Florida.

0000006373 00000 n The egg, larva, and pupal periods last for about 3–11, 3–42, and 5–7 days, respectively. 0000030554 00000 n

0000005198 00000 n Within the host, larvae develop into adults in less than two months.

The relationship between the larval developmental period and mean head capsule width was regular, and perfect geometric larval growth was observed in each instar across the food host when mean head capsule width was plotted against larval instar stage (Table 3 and Figure 1). Family Curculionidae, subfamily Pissodinae Bedell 1988. Wainhouse, D., Boswell, R.. & Ashburner, R Maturation feeding and reproductive development in adult pine weevil, Wilson, W.L. These animals can eat all ripe banana fruits in a field within a short time mainly because of their moving large numbers. Heavy infestation of adults and larvae of maize weevil which cause postharvest losses have become increasingly important constraints to storage entomology [8] and food security in the tropics. The effect of time of year on the development of immature stages of the Large Pine Weevil (, Moorhouse, E. R., A. K. Charnley, & A. T. Gillespie. Synopsis. & Day, K.R. The developmental period of 3rd instar larvae on rice was significantly ( < 0.05, F = 3.75) longer (6.5 days) and shortest on millet (5.3 days), whereas it was significantly ( < 0.05, F = 44) longest on maize at 4th instar stage and shortest on rice and sorghum (4.7 days). Nevertheless, mean growth ratios obtained in this study were similar to what was obtained in other curculionids: 1.4 for Conotrachelus psidii [23]; 1.3 for Dendroctonus valens [28]; and 1.3 for Sitophilus linearis [17].

), Pritchardia sp., Washingtonia sp., royal palms (Roystonea sp. J. Photograph by Robin M. Giblin-Davis, University of Florida. The common control methods for this pest are the use of chemical insecticides, biological control, and botanical insecticides [9–11] among others. Types of trap used for testing weevil pheromones. Sahota, T.S., Manville, J. F., Peet, F.G.,White, E.E., Ibaraki, A., & Nault, J. R. 1998. Weevils are a large, diverse and important group of insects. Mature grubs migrate to the periphery of the stem or petioles and prepare a cocoon from palm fibers. Dynamique des populations d’un ravageur du pin: Leather, S.R., Ahmed, S.I. Their prominent head is dark brown and very hard. Strains of B. bassiana have shown good potential to control adult BWB (reviewed by Gold et al., 2002, 2003). The adult male maize weevil was significantly ( < 0.05, F = 1.73) bigger on maize ( mm long  and   mm wide) and shortest on rice ( mm long  and   mm wide) although not bigger than body measurement of weevil on millet ( mm long  and   mm wide). Sunil Tewari, ... Cesar R. Rodriguez-Saona, in Integrated Pest Management, 2014. Besides causing root damage, nematodes act also as an important predisposing factor for most soilborne pathogens.

Embryonic development of, Moore, R. 2001. Figure 9.2. Giblin-Davis RM, Peña JE, Duncan RE. (1992) in Brazil evaluated an imported formulation of S. carpocapsae by spraying onto split pseudostems and pseudostem stumps as a baiting technique and observed 70% mortality of BWB adults. Adults live fairly long for 4–5 months in the winter. Henry A. Hespenheide, in Encyclopedia of Biodiversity, 2001. Feeding of adults of the large pine weevil. Palmetto weevil, Rhynchophorus cruentatus Fabricius, grubs feeding in palm crown. Schwerdtfeger, F. 1970. Nordenhem, H. 1989. Dispersal distances of migrating pine weevils. Google Scholar. Orientation of the pine weevil. Figure 14. Adults may live for several weeks to several months as long as moisture is available (up to 26 weeks in captivity). True yams are not a host of sweet-potato weevil and are rarely cultivated except in tropical areas. The authors declare that there is no conflict of interests regarding the publication of this article. Photograph by Michael Thomas, Division of Plant Industry. & Hogan, L. 1994. Örlander, G., Nilsson, U. 1993. Rough sweetpotato weevils, Blosyrus spp.

Kudela, M. 1974. 2016, Article ID 7836379, 8 pages, 2016. https://doi.org/10.1155/2016/7836379, 1Department of Crop Production, Kwara State University, Malete, Kwara State, Nigeria, 2Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Nigeria. 2002.

At Barro Colorado Island in Panamá, three years of light trapping (Wolda et al., 1998) yielded 1240 species of Curculionoidea (excluding Platypodinae and Scolytinae, but including about 200 species from four other families). Feeding and oviposition rates in the pine weevil, Carle, P. 1967.

Solbreck, C. 1980. They also described a method for introducing S. carpocapsae IJs into banana corms that involves removing cones from residual corms with a desuckering gouge and adding 2.5 × 105 IJs/cavity. There cannot be a realistic success in applied ecology and pest monitoring and management without a better understanding of the phenology and dynamics of insects’ life cycle [12]. Eidmann, H.H. This journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.

The humidity reactions of the large pine weevil, Havukkala, I. 1: (Z)-2-isopropenyl-1-methylcyclobutaneethanol (grandlure I); 2: (Z)-2-(3,3-dimethyl-cyclohexylidene) ethanol (Z grandlure II); 3: (E)-2-(3,3-dimethyl-cyclohexylidene) ethanol (E grandlure II); 4: (Z)-(3,3-dimethylcyclohexylidene) acetaldehyde (grandlure III); 5: (E)-(3,3-dimethylcyclohexylidene) acetaldehyde (grandlure IV); 6: (E)-3,7-dimethyl-2,6-octadien-1-ol) (geraniol); and 7: (E)-3,7-dimethyl-2,6-octadienoic acid (geranic acid).

Giblin-Davis RM, Oehschlager AC, Perez A, Gries G, Gries R, Weissling TJ, Chinchilla CM, Peña JE, Hallett RH, Pierce, Jr HD 1996. Increased release of host volatiles from feeding scars: a major cause of field aggregation in the pine weevil, Van Tol, R.W.H.M. Black vine weevil reproductive potential on selected plants. The biology of an undescribed weevil,Eutinobothrus sp., and its specificity toSida acuta, a serious weed in northern Australia, were studied in a quarantine facility in Australia. Stored Product Protection. Untersuchungen zur Frassaktivität des Grossen braunen Russelkäfers. Weekly trapping of weevils over a 9-month monitoring period showed significant reduction in unmarked and marked weevil populations in B. bassiana–treated plots.

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