Apart from rice, it also feeds upon wheat, com, jaw, barley etc. S. oryzae can infest maturing grain, especially maize in the field, in the southern USA and in other warm and tropical regions. Association between rice grain characteristics and Sitophilus oryzae development were deciphered through laboratory experiments. Sitophilus oryzae is supposed to be a native of India, although few are of the opinion that some temperate country is its original home. Introduction to Sitophilus oryzae: scientific and common names, protected status (red lists, regulations), biological status in France, historical and contemporary. The snout is long (1 mm), almost 1/3 of the total length. What are the damages caused by Sitophilus oryzae. Unlike S. granarius , the adults may disperse by flight from stored products and infest crops growing in the open, these infestations generally continue after harvesting and so the species may be very difficult to control. Content Guidelines 2. Nowadays, it is believed to be most widely distributed among the known insect pests of the world as through shipments of grains have reached all over the world. : I Distribution and Description of the Organisms - Volume 85 Issue 10 - A. J. Musgrave, J. J. Miller Mankin,2 B.W. ... Entomotoxic effect of silica nanoparticles against Sitophilus oryzae (L.) . Several other Sitophilus use the acorns of oaks such as bluejack oak ( Quercus incana) and moru oak ( Q. floribunda ). The pupa does not feed. Sitophilus oryzae (L.), S. granaries (l.), and S. zeamais (Motsch.) It is recorded from Australia, Fiji 1 and New Zealand. They can exist anywhere where physical conditions for growth are favourable and the grain is left undisturbed for some time. In continuing your browsing of this site, you accept the use of cookies to offer you suitable content and services and realize visits statistics. Larvae - Feed in grain. Rice weevils are scientifically known as Sitophilus Oryzae. It is recorded from Australia, Fiji 1 and New Zealand. Results 3.1. zeamais in stored maize and wheat. J. Pest Sci, Identification: Adults are 3 – 4 mm, dark brown to black, and the elytra each have two dull orange spots, while flight wings (under elytra) are present, the thorax has circular shaped punctures, and the club-shaped antennae are kinked halfway. It has irregularly shaped pits on its thorax, also four light spots are found on wing covers. Attack is evidenced by, // and S. Host range Gram, mung (Phaseolus aureus), moth (Phaseolus aconitifolius), peas, cow peas, lentil and arhar (Cajanus cajan), cotton seed, sorghum and maize. 339). Association between rice grain characteristics and Sitophilus oryzae development were deciphered through laboratory experiments. Smith,1 and D. Baributsa,3 Distribution and status               World-wide and is found practically throughout India. Inside the seed, its cuticle hardens and matures. Inhibitory Effect of Buprofezin on the Progeny of Rice Weevil, Sitophilus oryzae L. (Coleoptera: Curculionidae) Gopal Das* Department of Entomology, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh Abstract Content Filtrations 6. zeamais in stored maize and wheat. Distribution: Worldwide. Distribution: Worldwide. It is the most destructive pest of stored grain. The female uses strong mandibles to chew a hole into a grain kernel after which she deposits a single egg within the hole, sealing it with secretions from her ovipositor. Sitophilus is a genus of weevils in the tribe Litosomini. Destructive: attacks sound grains, leaving large cavities, allowing secondary invasions by insects, mites, and fungi. Sitophilus oryzae (L.), in milled, brown, and rough rice. Distribution: Google ¦ ... J.K., and Tran, H.Q. It has the typical prolonged snout of the weevils, and resembles the rice weevil (Sitophilus oryzae), having pitted elytra, but is darker brown. The most significant identification feature of weevils is their snout, which is pretty long. Table of … The species is originally from India, but now it is found around the world as its has been transported in grain. (adsbygoogle = window.adsbygoogle || []).push({}); Asia, Africa, North, Central and South America, the Caribbean, Europe, Oceania. Distribution and status USA, Mauritius, Formosa, Africa, China, the Philippines, Japan, Indonesia, Sri Lanka, Myanmar and India. Distribution. Sitophilus oryzae (lesser grain weevil or rice weevil); adults in rice grains. An examination of the intensity, energy spectrum, and spatial distribution of the diffuse gamma-radiation observed by SAS-2 satellite away from the galactic plane in the energy range above 35 MeV has shown that it consists of two components. Pupa: The pupa stage lasts for 6 days. Female rice weevil lays about 4 eggs/day. During its life span of 5 months, it lays a total of about 250-400 eggs. A female may lay as many as 300 to 550 eggs in 4-5 months. Distribution: Cosmopolitan, especially in the warmer parts of the world.. Morphology: The larvae of both species are apodous, whitish, with brown heads, about 3-4 mm long. The maize weevil is found in all warm and tropical parts of the world. Results 3.1. Twenty-three Sitophilus strains, 10 individuals of each, belonging to three species (S. oryzae, S. zeamais, and S. granarius), were collected from different locations worldwide and tested by using specific PCR primers and FISH experiments for the presence of SOPE and Wolbachia (Table 1). Nine autosomal pairs showed a metacentric morphology; only the autosomal pair 6 was submetacentric (Fig. The pupa undergoes major internal and external changes inside the grain to develop into an adult. In Korea, the classification of the Sitophilus weevil group occurring in stored grains has been confused, resulting in its misidentification in most references reporting Sitophilus oryzae (Linnaeus). // ]]>. Finally the insect emerges out as a developed adult. The eggs hatch in 3 days. The rice weevil may be found in the paddy fields as well. However, we recently found and identified rice weevil ( S. oryzae) populations in stored rice grains in the rice processing complex in South Korea. Distribution Top of page S. zeamais and S. oryzae are found in all warm and tropical parts of the world, but S. oryzae may also be found in temperate climates. On rice, maize, sorghum, wheat, cassava, and other stored products. Some species are familiar as pests of stored food products. However, this pest is particularly common in warm countries. It is a pest of stored maize, dried cassava, yam, common sorghum and wheat. The rice weevil may be found in the paddy fields as well. Sitophilus species (Curculionidae: Coleoptera) are considered to be the most serious insect pests of stored cereals in the world ().One of these species, the rice weevil (Sitophilus oryzae (L.)), is particularly destructive, infesting numerous food grains including rice, wheat, maize, sorghum, oats, rye, barley and other cereals (Koehler, 1994, Grenier et al., 1997). The pupa goes through great changes both internally and externally. They infest wheat, oats, rye, barley, rice, and corn. It consumes several times its own weight and periodically moults to increase in size. 33. Rice weevil (Sitophilus oryzae) Type of pest: Primary pest. It prefers warmer climates and so is more prevalent in the southern states. [CDATA[ It is widespread in the southern United States. Under optimum conditions (during August-September) the eggs hatches into larvae in 3-4 days but during winter the hatching may take 6-9 days. 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