Current Research in Agriculture and Farming (CRAF)
Year : 2021, Volume : 2, Issue : 3
First page : (17) Last page : (21)
Article doi: : http://dx.doi.org/10.18782/2582-7146.140
Muhammad Ijaz1* , Muhammad Salman Akram1, Muhammad Irfan2, Muhammad Nouman Khalid3, Muhammad Hassan1, Mamoon Shafiq1
1Department of Entomology, University of Agriculture, Faisalabad, Pakistan
2Department of Entomology, University of Agriculture, Faisalabad
3Department of Plant Breeding and Genetics, University of Agriculture, Faisalabad, Pakistan
*Corresponding Author E-mail: mijaz761761@gmail.com
Received: 20.03.2021 | Revised: 27.04.2021 | Accepted: 6.05.2021
ABSTRACT
Cotton grey weevil is becoming a primary pest of agricultural and horticultural crops all over the world including Pakistan. The various management strategies such as chemical, biological and cultural have been adopted against this pest throughout the globe. The previous published literature was reviewed with the aim to evaluate the best strategy among all strategies to control the pest. Male is shorter as compared female with approximately 6.0 to 8.5 mm length. Adult feed on the leaves and cause huge crop losses. The current reviewed literature concluded that chemical control can give quick control of adult due to their fly ability while control of pupae, larvae and eggs is difficult due to their location in or on the soil. The excessive use of chemicals to control pest can caused mortality of other biological fauna. To avoid the excessive application of chemicals, biological and botanical control should be promoted and applied that will prove best option against the current pest.
Keywords: Cotton grey weevil, Asian grey weevil, Life cycle, Host plants, Integrated Pest Management.
Cite this article: Ijaz, M., Akram, M. S., Irfan, M., Khalid, M. N., Hassan, M., & Shafiq, M. (2021). Biology and Management of Cotton Grey Weevil: A Review, Curr. Rese. Agri. Far. 2(3), 17-21. doi: http://dx.doi.org/10.18782/2582-7146.140
INTRODUCTION
Cotton grey weevil, Myllocerus spp. is the most important pest of cotton crop which belonging to Curculionidae family under the order Coleoptera. It is the most destructive pest of various fruit and ornamental plants (Hill 1987; & Mannion et al., 2006). It is also called Asian grey weevil/Sri lankan weevil which has been spread from Asia (Pakistan, Indian, Srilanka) to America and European countries. Almost there are 336 species of this Genus has been identified from Asia, Africa, Australia, America (O’Brien et al., 2006) and about 73 species reported from the Indian subcontinent.
It is a polyphagous insect, attack on more than 20 host plants which are economically important. The adult of this pest damages the different ornamental, fruit and vegetables plant species feeding on foliage, however, larvae attack on roots.
This pest attack can by controlled by traditional techniques including insecticidal applications. Owing to its flight behavior, hiding ability, chemicals-based practices are considered not good for the control of its attack. The weevils can be eliminated from plants by shaking a branch to collect and dumped into the soapy water. The insecticides recommended by the government has applied in field for pest attack control and updated yearly.
The IPM practices such as carious agronomic practices, chemicals, biological practices and mass trapping of adults have been developed and implemented in all over the world where this pest attack has severally found.
Taxonomic classifications
Myllocerusis most common genus of grey weevil which has different species and subspecies which attack on more than 20 different crops in Indo-Pak subcontinent (O’Brien et al., 2006). The most important species including cotton grey weevil, Myllocerus maculosus Desbrochers (Curculionidae: Coleoptera), Asian Grey Weevil, Myllocerus undecimpustulatus undatus Marshall (Curculionidae: Coleoptera) and also called Srilankan weevil. The other species almond weevil (M. letivirens), mango leaf weevil (M. sabulosus), cocoa green leaf weevil (M. viridanus), apple weevil (M. discolor) and coconut ash weevil (M. curvicornis).
Hosts range
The Genus Myllocerusis of economic importance and has a wide host range of over 150 plant species. There are many plant species can be attacked by this pest including Citrus (Citrus spp.), Green buttonwood (Conocarpus erectus), Hong Kong orchard trees (Bauhinia x blakeana), Coco-palm (Chrysobalanus icaco), Date palm tree (Phoenix roebellenii), Peach tree (Prunus persica), Crepe myrtle (Lagerstroemia indica), Pepper (Capsicum spp.,), Strawberry plant (Muntingia calabura), Egg-plant (Solanum melongena), Plumbaginaceae (Plumbago auriculate), Polygonaceae (Coccoloba diversifolia), Rhamnaceae (Kragiodendron ferreum), Rosaceae (Eriobotrya japonica), Ulmaceae (Celtis laevigata), Verbenaceae (Duranta erecta), Vitaceae (Parthenocissus quinquefolia), Aquifoliaceae (Ilex cassine), Arecaceae (Caryota nucifera), Asteraceae (Ambrosia artemisiifolia), Bombacaceae (Bombax ceiba), Calophyllaceae (Mammea sapota), Chenopodiaceae (Spinacia oleracea), Chrysobalanaceae (Chrysobalanus icaco), Combretaceae (Bucida buceras), Cupressaceae (Platycladus orientalis) and Elaeocarpaceae (Muntingia calabura).
Another plant species Areca palm (Dypsis lutescens);Longan (Euphoria longana), Hibiscus plant (Hibiscus rosa-sinensis);Lychee tree (Litchi chinensis),Mamey(Mammea sapota); Winged bean (Psophocarpus tetragonolobus), Australian bush-cherry (Syzygium paniculatum)and Tropical almond (Terminalia catappa) (Shanthichandra et al., 1990; & Thomas, 2000).
Global Distribution
The Myllocerus spp., found in all over the world from Asian continent (India, Pakistan, China, Japan and Srilanka) Americas Florida sites (Charlotte, Collier, Miami-Dade, Palm Beach, Orange, Polk and Sarasota) (George et al., 2015); Africa, Palearctic, Indonesia and Australia and Europe. It was first reported from Srilanka in 1990 from leaves of winged bean (Shanthichandra et al., 1990); from South Florida, it was reported in 1995; USA from Broward County, FL, 2000; India (Kerala) 2010; Caribbean UK Overseas Territories, 2016; (Thomas 2005; O’Brien et al., 2006; & Josephrajkumar, 2011).
Biology and life cycle
Eggs
The female weevil laid up to 360 eggs on organic materials on the soil surface within the 24 hours. The eggs are oval shaped (0.5 mm length) creamy white in color laid in clusters form. At near to hatching creamy color change into brownish (Atwal, 1976).
Larvae
The white color grub with brownish red head size ranges 1-4 mm in length from first to later instar larvae (fourth). They feed on the roots of plants under the soil and then pupate inside the soil (Butani, 1979).
Pupal stage
Pupation took placed in soil which lasted 5-7 days.
Adults
The adults of this weevil may range from 6-8.5mm in length while female weevil is larger than male (1-2 mm approximately), and weevil have dark dotted to greyish elytra with yellow colored head. The weight of the female weevil twice that of male (George et al., 2015). The weevils feed on the margin of leaves and eating away small patches of leaf lamina, adult lives vary in both seasons from summer (8 -11 days) to winter (4-8 months) (Butani, 1979).
Total life period from egg to adult
Its total life period from egg to adult was three weeks that reported by many researchers. The variations had been recorded by many early researchers on the basis of environmental conditions (Thomas, 2005).
No. of generations
8-10 number of generations per year had been reported by many scientists (Josephrajkumar et al., 2010).
Damage
Leaf notching can cause during severe attack of adults that feed on leaves. Adult feed on the margin or corner of leaf and during severe attack of pest, complete defoliation of leaves occurred. It has been observed that adult mostly feed on the new leaves of plant and resulting plant decline and even stunting the plant growth (Arevalo & Stansly, 2009; & George et al., 2019).
Management
Quarantines
Several species of the Genus Myllocerushas considered pests but no patent information on a specific quarantine was found. Although, few references exist on this weevil may be considered as a pest of quarantine significance.
Cultural Control
The grub of this weevil can be killed by frequent hoeing, trap cropping is a very good strategy to eradicate cotton grey weevil from the cotton field. Integration of cultural practices with other practices is a tremendous potential for the management of cotton grey weevil. By use of these practices, farmer will less dependent on the use of chemical based products for insect pest control and are very helpful for small scale farmers.
Biological control
Several natural enemies are helpful for the control of Myllocerus undecimpustulatus undatus. Braconid parasite Dinocampus mylloceri Wilkinson (Pruthi and Batra, 1960) and semi-parasitic mite was recorded as natural enemies of this weevil. In India, semi-parasitic mites have been observed in the body of cotton grey weevil during experiment (Geetha et al., 2013). These all may consider as biological control agents for this weevil.
Chemical Control
Several insecticides carbaryl, acephate and pyrethroids are effective for controlling of leaf-feeding insects and these are especially for Myllocerusspp., to suppress the populations. However, larvae buried inside the soil and pupate, so methyl iodide and methyl bromide soil fumigation technique have good option as a fumigant against these type of insects (Eayre et al., 2000; & Waggoner et al., 2000). ( Arévalo & Stansl, 2009) applied chlorpyrifos on ground and foliage which was provided better control against the cotton grey weevil in Florida.
REFERENCES
Arevalo, H. A., & Stansly, P. A. (2009). Suppression of Myllocerus undatus (Coleoptera: Curculionidae) in Valencia orange with chlorpyrifos sprays directed at ground and foliage. Florida entomologist, 92(1), pp.150-152.
Atwal, A. S. (1976). Agricultural Pests of India and Southeast Asia. Kalyanri Publishers, Delhi, India.
Butani, D. K. (1979). Insects and Fruits. Periodical Expert Book Agency, India.
Eayre, C., Sims, J., Ohr, H., & Mackey, B. (2000). Evaluation of methyl iodide for control of peach replant disorder. Plant Disease 84, 1177-1179.
Geetha, G. T., Krishna Kumar, N. K., & Mahmood, R. (2013). Identification of Semi-parasitic mites on Myllocerusundecimpustulatusundatus Marshall. Advances in Bioresearch, 4(4).
George, J., Morse, W. C., & Lapointe, S. L. (2015). Morphology and sexual dimorphism of the weevil Myllocerusundecimpustulatusundatus (Coleoptera: Curculionidae). Annals of the Entomological Society of America, 108(3), pp. 325-332.
George, J., Morse, W. C., & Lapointe, S. L. (2015). Morphology and sexual dimorphism of the weevil Myllocerus undecimpustulatus undatus (Coleoptera: Curculionidae). Annals of the Entomological Society of America, 108(3), pp. 325-332.
Hill, D. (1987). Agricultural insect pests of temperate regions and their control. New York, NY: Cambridge University Press.
Hill, D. (1987). Agricultural insect pests of temperate regions and their control. New York, NY: Cambridge University Press.
Josephrajkumar, A., Rajan, P., Mohan, C., & Thomas, R. J. (2011). First record of Asian grey weevil (Myllocerus undatus) on coconut from Kerala, India. Phytoparasitica, 39(1), pp. 63-65.
O’Brien, C. W., Haseeb, M., & Thomas, M. C. (2006). Myllocerus undecimpustulatus undatus Marshall (Coleoptera: Curculionidae), a recently discovered pest weevil from the Indian Subcontinent. Florida Department of Agriculture & Consumer Services, Division of Plant Pathology, Entomology Circular No. 412.
Pruthi, H. S., & Batra, H. N. (1960). Important Fruit Pests of North-west India. Issued by The Indian Council of Agricultural Research. Government of India Press, Nasik Road, Delhi, India.
Pruthi, H. S., & Batra, H. N. (1960). Important Fruit Pests of North-west India. Issued by The Indian Council of Agricultural Research. Government of India Press, Nasik Road, Delhi, India.
Shanthichandra, W. K. N., Gunasekera, S. A., & Price, T. V. (1990). Diseases and pests of the winged bean (Psophocarpus tetragonolobus [L.] DC.) in Sri Lanka. International Journal of Pest Management, 36, 375–379.
Thomas, M. C. (2000). Pest Alert: Myllocerus sp. (near) undecimputulatus Faust, a weevil new to the Western Hemisphere. This document is available at the following website: http://doacs.state.fl.us/~pi/enpp/ento/weevil-pest-alert.htm.
Thomas, M. C. (2005). Myllocerus undatus Marshall, a weevil new to the Western Hemisphere. Florida Department of Agriculture and Consumer Services Pest Alert, DACSP-01635. (http://freshfromflorida.s3.amazonaws.com/myllocerus-undatus.pdf) (accessed 31 January 2017).
Waggoner, M., Ohr, H., Adams, J., & Gonzalez, D. (2000). Methyl iodide: an alternative to methyl bromide for insectary fumigation. J. Appl. Ent. 124, 113-117.
Arevalo, H. A., & Stansly, P. A. (2009). Suppression of Myllocerus undatus (Coleoptera: Curculionidae) in Valencia orange with chlorpyrifos sprays directed at ground and foliage. Florida Entomologist 92, 150-152.
Josephrajkumar, A., Rajan, P., Mohan, C., & Thomas, R. J. (2010). First record of Asian grey weevil (Myllocerus undatus) on coconut from Kerala, India. Phytoparasitica 39, 63-65.
Mannion, C., Hunsberger, A., Gabel, K., Buss, E., & Buss, L. (2006).Sri Lanka weevil (Myllocerus undatus). University of Florida/IFAS, Tropical Research and Education Center, Homestead. August 2006: pp. 1-2. (23 October 2013)
Thomas, M. (2005). Myllocerus undatus Marshall, a weevil new to the Western Hemisphere. Pest Alert. Florida Department of Agriculture and Consumer Services, Division of Plant Industry. (12 April 2017).
George, J., Shareef, S., & Lapointe, S. L. (2019). Biology, chemical ecology, and sexual dimorphism of the weevil Myllocerus undecimpustulatus undatus (Coleoptera: Curculionidae). Florida Entomologist, 102(3), 464-468.