scholarly journals Measuring the Benefit of Biological Control for Single Gene and Pyramided Host Plant Resistance for Aphis glycines (Hemiptera: Aphididae) Management

2012 ◽  
Vol 105 (5) ◽  
pp. 1835-1843 ◽  
Author(s):  
M. T. McCarville ◽  
M. E. O'Neal
Keyword(s):  
Biological Control ◽  
Host Plant ◽  
Plant Resistance ◽  
Host Plant Resistance ◽  
Single Gene ◽  
Aphis Glycines

The sugarcane lophopid planthopper Pyrilla perpusilla (Homoptera: Lophopidae): a review of its biology, pest status and control

1996 ◽  
Vol 86 (5) ◽  
pp. 485-498 ◽  
Author(s):  
N.C. Kumarasinghe ◽  
S.D. Wratten
Keyword(s):  
Biological Control ◽  
Life Cycle ◽  
Host Plant ◽  
Plant Resistance ◽  
Host Plant Resistance ◽  
Published Data ◽  
Biological Control Agents ◽  
Replicated Observations ◽  
Pyrilla Perpusilla ◽  
And Control

AbstractThe biology, damage and control of the sugarcane pest Pyrilla perpusilla Walker are reviewed. The present systematic position, distribution and the range of alternative host plants are surveyed and the life cycle and the extent of damage caused by the pest are considered in detail. The factors influencing the abundance of the insect are discussed, with emphasis on their use in reducing the population of the pest. Much of the published data in this area is based on un replicated observations. However, potential biological control agents for the insect are evaluated with special reference to the most effective nymphal and adult ‘parasitoid’, the moth Epiricania melanoleuca (Fletcher). Many other potential biological control agents have received some study, but in most cases, little more than basic biological information on phenology and life cycle has been published. As considerable changes in chemical control practices over the past fifty years have occurred, these, together with other control methods such as agronomic, mechanical, cultural and host plant resistance approaches are discussed along with prospects for the future, sustainable control of the pest. Research areas which are in need of more work are identified: these are biological control and cultural practices. It is suggested that an integrated approach to future research should be made, incorporating at least host-plant resistance and predation.

scholarly journals Consumers' Preference for Insecticide-free Pumpkins in Eastern Kansas

1995 ◽  
Vol 5 (3) ◽  
pp. 274-276
Author(s):  
Denise L. Olson ◽  
James. R. Nechols ◽  
Charles W. Marr
Keyword(s):  
Biological Control ◽  
Host Plant ◽  
Plant Resistance ◽  
Host Plant Resistance ◽  
Cost Benefit ◽  
Retail Price ◽  
Farmers Markets ◽  
Intended Use

A survey conducted at farmers' markets in eastern Kansas showed that more consumers purchased pumpkins for jack-o-lanterns than for cooking. One to four jack-o-lantern pumpkins are purchased annually per consumer. Whether or not the pumpkins are treated with insecticides to control squash bugs and regardless of their intended use, consumers preferred U.S. no. 1 grade, which sell at the higher retail price of $0.33/kg. At least 90% of the consumers surveyed would pay 20% more than the retail price for insecticide-free pumpkins. About two-thirds of those polled would pay 30% more. Cost-benefit data indicate that the higher prices consumers would pay may not be sufficient for growers to produce insecticide-free pumpkins economically using only biological control. However, if biological control is integrated with host-plant resistance, the higher prices may be sufficient for growers to produce insecticide-free pumpkins.

Genetic Diversity and Differentiation among Laboratory and Field Populations of the Soybean Aphid, Aphis glycines

2010 ◽  
Vol 100 (6) ◽  
pp. 727-734 ◽  
Author(s):  
A.P. Michel ◽  
W. Zhang ◽  
M.A. Rouf Mian
Keyword(s):  
Genetic Diversity ◽  
Host Plant ◽  
Plant Resistance ◽  
Host Plant Resistance ◽  
Genotypic Diversity ◽  
Soybean Aphid ◽  
Aphis Glycines ◽  
Invasive Pest ◽  
Resistance Screening ◽  
Laboratory Populations

AbstractThe soybean aphid, Aphis glycines Matsumura, is a recent invasive pest of soybean in North America. Currently, much research is focused on developing and characterizing soybean cultivars expressing host-plant resistance. During the initial phases of host-plant resistance screening, many of these studies use soybean aphid laboratory populations. Previous studies in other systems have documented substantial differences among laboratory and field populations. Whether or not this pattern exists in A. glycines is unknown, but it is extremely important when estimating the level of selection and virulence to host-plant resistant soybeans. In this study, we used seven microsatellite markers to estimate and compare genetic diversity and differentiation among five laboratory and 12 field populations. Our results indicate that soybean aphid laboratory populations are severely lacking in genotypic diversity and show extreme genetic differentiation among each other and to field populations. Continued use of laboratory populations for initial soybean aphid resistance screening could lead to erroneous estimations of the potential success for host-plant resistance.

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