Physical, Mechanical and Cultural Control of Vegetable Insects

2016 ◽  
pp. 131-148 ◽  
Author(s):  
Kenneth A. Sorensen ◽  
Subbarayalu Mohankumar ◽  
Sonai Rajan Thangaraj
Keyword(s):  
Cultural Control

New Technologies to Combat Herbicide Resistance

2020 ◽  
Vol 31 (2) ◽  
pp. 90-92
Author(s):  
Rob Edwards
Keyword(s):  
Winter Wheat ◽  
Herbicide Resistance ◽  
Cover Crops ◽  
New Technologies ◽  
Green Revolution ◽  
Arable Land ◽  
Limited Range ◽  
Cultural Control ◽  
Arable Farming ◽  
The Uk

Herbicide resistance in problem weeds is now a major threat to global food production, being particularly widespread in wild grasses affecting cereal crops. In the UK, black-grass (Alopecurus myosuroides) holds the title of number one agronomic problem in winter wheat, with the loss of production associated with herbicide resistance now estimated to cost the farming sector at least £0.5 billion p.a. Black-grass presents us with many of the characteristic traits of a problem weed; being highly competitive, genetically diverse and obligately out-crossing, with a growth habit that matches winter wheat. With the UK’s limited arable crop rotations and the reliance on the repeated use of a very limited range of selective herbicides we have been continuously performing a classic Darwinian selection for resistance traits in weeds that possess great genetic diversity and plasticity in their growth habits. The result has been inevitable; the steady rise of herbicide resistance across the UK, which now affects over 2.1 million hectares of some of our best arable land. Once the resistance genie is out of the bottle, it has proven difficult to prevent its establishment and spread. With the selective herbicide option being no longer effective, the options are to revert to cultural control; changing rotations and cover crops, manual rogueing of weeds, deep ploughing and chemical mulching with total herbicides such as glyphosate. While new precision weeding technologies are being developed, their cost and scalability in arable farming remains unproven. As an agricultural scientist who has spent a working lifetime researching selective weed control, we seem to be giving up on a technology that has been a foundation stone of the green revolution. For me it begs the question, are we really unable to use modern chemical and biological technology to counter resistance? I would argue the answer to that question is most patently no; solutions are around the corner if we choose to develop them.

CONTROLLING SUFETULA SPP.: A COCONUT INSECT PEST ON PEAT SOILS

2007 ◽  
Vol 43 (3) ◽  
pp. 289-299 ◽  
Author(s):  
X. BONNEAU ◽  
M. HUSNI ◽  
L. BEAUDOIN-OLLIVIER ◽  
JOKO SUSILO
Keyword(s):  
Insect Pest ◽  
Bare Soil ◽  
Cultural Control ◽  
Control Measures ◽  
Control Methods ◽  
Peat Soils ◽  
Depressive Effect ◽  
Moss Cover ◽  
Adult Insect ◽  
The Impact

We demonstrated experimentally that Sufetula, a root-mining insect, has a depressive effect on coconut yields on peat soils. The impact of the pest resulted in a shortfall in earnings that warranted taking control measures. We considered control methods suitable for rehabilitating infested mature coconut plantings and for preserving young coconut plantings. Currently, cultural control is the only effective method. It involves eliminating all identified shelters for the adult insect, i.e. fern cover and heaps of coconut waste (dry fronds and husks). The aim is to achieve totally bare soil, with moss cover that does not attract the pest, or planted with an unattractive intercrop such as pineapple.

SIMULATION OF INTEGRATED CONTROL STRATEGIES FOR OROBANCHE SPP. BASED ON A LIFE CYCLE MODEL

2001 ◽  
Vol 37 (1) ◽  
pp. 37-51 ◽  
Author(s):  
E. KEBREAB ◽  
A. J. MURDOCH
Keyword(s):  
Seed Bank ◽  
Control Strategies ◽  
Soil Seed Bank ◽  
Integrated Control ◽  
Integrated Approach ◽  
Cultural Control ◽  
Computer Simulation Model ◽  
Weed Species ◽  
Hand Weeding ◽  
High Level

A computer simulation model was developed to investigate strategies for control of the parasitic weed species of Orobanche. The model makes use of data from published literature and predicts infestation levels in a dynamic and deterministic way. It is predicted that sustainable control of the parasite can only be achieved by reducing the soil seed bank to levels of 1000–2000 seeds m−2 and maintaining it at that level in subsequent years. When cultural control methods such as hand weeding, trap/catch cropping, delayed planting, resistant cultivars and solarization were considered individually, a relatively high level of effectiveness was required to contain the soil seed bank. An integrated approach with a selection of appropriate cultural methods is therefore recommended for further testing and validation in the field. The simulations demonstrate the importance of preventing new seeds entering the soil seed bank and that although reducing the soil seed bank may not increase yield for the first few years, it will ultimately increase production.

Papuana huebneri (taro beetle).

2021 ◽  
Author(s):  
Angela Whittaker
Keyword(s):  
Papua New Guinea ◽  
Metarhizium Anisopliae ◽  
Fungal Pathogen ◽  
Management Strategy ◽  
Solomon Islands ◽  
Cultural Control ◽  
Control Measures ◽  
Pacific Region ◽  
Cultural Traditions ◽  
Loss Of Genetic Diversity

Abstract Papuana huebneri is one of at least 19 species of known taro beetles native to the Indo-Pacific region; it is native to Papua New Guinea, the Molucca Islands in Indonesia, the Solomon Islands and Vanuatu, and has been introduced to Kiribati. Taro (Colocasia esculenta) is an important crop in these countries; high infestations of P. huebneri can completely destroy taro corms, and low infestations can reduce their marketability. The beetle also attacks swamp taro or babai (Cyrtosperma chamissonis [Cyrtosperma merkusii]), which is grown for consumption on ceremonial occasions. Infestations of taro beetles, including P. huebneri, have led to the abandonment of taro and swamp taro pits in the Solomon Islands and Kiribati, resulting in the loss of genetic diversity of these crops and undermining cultural traditions. P. huebneri also attacks a variety of other plants, although usually less seriously. Management today relies on an integrated pest management strategy, combining cultural control measures with the use of insecticides and the fungal pathogen Metarhizium anisopliae.

Unrevolutionary Mexico

2021 ◽  
Author(s):  
Paul Gillingham
Keyword(s):  
Twentieth Century ◽  
Latin America ◽  
Mexican Revolution ◽  
Cultural Control ◽  
Partido Revolucionario Institucional ◽  
Authoritarian State ◽  
Entry Points ◽  
Low Culture ◽  
New Generation

Unrevolutionary Mexico addresses how the Mexican Revolution (1910-1940) turned into a capitalist dictatorship of exceptional resilience. While soldiers seized power across the rest of Latin America, in modern Mexico the civilians of a single party moved punctiliously in and out of office for seventy-one years. The book uses the histories of the states of Guerrero and Veracruz as entry points to explore the origins and consolidation of this unique authoritarian state on both provincial and national levels. An empirically rich reconstruction of over sixty years of modernization and revolution (1880-1945) revises prevailing ideas of a pacified Mexico and establishes the 1940s as a decade of faltering governments and enduring violence. The book then assesses the pivotal changes of the mid-twentieth century, when a new generation of lawyers, bureaucrats and businessmen joined with surviving revolutionaries to form the Partido Revolucionario Institucional, which held uninterrupted power until 2000. Thematic chapters analyse elections, development, corruption and high and low culture in the period. The central role of military and private violence is explored in two further chapters that measure the weight of hidden coercion in keeping the party in power. In conclusion, the combination of provincial and national histories reveals Mexico as a place where soldiers prevented coups, a single party lost its own rigged elections, corruption fostered legitimacy, violence was concealed but decisive, and ambitious cultural control co-existed with a critical press and a disbelieving public. In conclusion, the book demonstrates how this strange dictatorship thrived not despite but because of its contradictions.

Biological Events and Cultural Control

Signs ◽  
1977 ◽  
Vol 3 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Carol P. MacCormack
Keyword(s):  
Cultural Control
Sign in / Sign up

Export Citation Format

Share Document