Evaluation of Relative Susceptibililty/resistance to Some Conventional Insecticides in Cotton Whitefly, Bemisia Tabaci (Gennadius) Population in Andhra PRadesh PDF Download

Author: M. Bharathi
Publisher:
ISBN:
Category :
Languages : en
Pages : 63

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Author: Chettubattina Chinnabbai
Publisher:
ISBN:
Category :
Languages : en
Pages : 11

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Author: N.S. Butter
Publisher: CRC Press
ISBN: 1000469301
Category : Technology & Engineering
Languages : en
Pages : 236

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Book Description
In all, 1550 species of whiteflies have been identified. The rapid spread of Bemisia tabaci has occurred throughout the globe and it is regarded as the most notorious species. It is a complex species known to contain many biotypes namely, New World (Biotype -A), B-biotype MEAM1 (Biotype-B or Bemisia argentifolii, and MED (Biotype-Q) depending upon the geographical location. The complete information on the bio-ecology of important species along with the feeding mechanism has been presented in this book. The use of modern techniques of identification has added more biotypes considering the variations in host range, species of endosymbionts, virus transmission efficiency, and resistance to pesticides. The resistance and resurgence due to pesticides has been discussed in the monograph. The information on economic thresholds for judicious use of pesticides or release of natural enemies against whiteflies has been quoted in this compilation The pest control methods, namely chemical, cultural measures, biocontrol agents, resistant varieties, and mechanical devices have been elaborated on. Based on the availability of information the integrated model has been suggested to contain the whitefly menace under different situations. Considering the key factors responsible for the outbreak of whiteflies, a sound system of IPM has been formulated. The book also contains the use of semiochemicals and biotechnological tools likely to gain momentum in the future.

Author: Frank John Byrne
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Tapan Kumar Hath
Publisher:
ISBN:
Category : Electronic books
Languages : en
Pages : 0

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The whitefly, Bemisia tabaci (Gennadius) is a polyphagous pest causing considerable yield loss to many crops around the globe. It is a phloem feeder and transmits several viral diseases as well. It has great genetic diversity and is considered a complex of biotypes. Despite the adoption of several available control strategies, management by chemical pesticides has still been the first choice for the farmers to protect their crops. However, prolonged use of chemical pesticides has ultimately accelerated the development of multifold resistance against various groups of insecticides in different parts of the world. The status of development of insecticide resistance against different groups of insecticides by this pest, mechanisms of resistance, cross-resistance, role of detoxifying enzymes, and management issues have been discussed in this chapter.

Author: Brandon Wayne Ripple
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Whiteflies (Bemisia tabaci, Biotype B, Homoptera: Aleyrodidae) are pests of cotton crops, affecting the yield of the crop both indirectly and directly. These pests feed on the leaves of cotton plants and produce "honeydew," a sticky liquid excretion which covers the lint of the open cotton boll creating problems during the processing of the lint. High densities of these pests also can decrease the productivity of the cotton plant by stripping it of vital nutrients. The primary objective of this research was to screen 116 converted cotton race stocks for resistance to sweetpotato whiteflies. Responses of converted race stocks to whiteflies are compared to that of known susceptible commercial cultivars PSC 355 and Delta Pearl. Screens for antibiosis resistance to whitefly were established using excised leaves placed in a nutrient solution (1/4 strength Hoagland's). Cohort populations of whiteflies were established on these leaves and followed daily to determine differences in developmental time as well as percent survival. Resistant candidates were determined using a chi-squared test comparing the ranked sums of leaf averages for the two selection criteria, whitefly developmental time and percent whitefly survival, of each cotton race stock to that of the putative known susceptibles (KS). These tests showed 6 converted race stocks to be significantly different (P

Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 782

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Author: Maurice Berkeley Green
Publisher:
ISBN:
Category : Cotton
Languages : en
Pages : 268

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Author: Omkar
Publisher: Springer Nature
ISBN: 9811561494
Category : Science
Languages : en
Pages : 515

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Book Description
Sucking pests are most notorious group of pests for agricultural crops. Unlike most pests with chewing mouth parts, sucking pests cause more severe damage to the crops and are complex to get identified until advanced stages of infection. Not only is this late detection detrimental to their effective control, sucking pests also often cause fungal growth and virus transmission. The book emphasizes on sucking pests of most major crops of India. It aims to reflect Indian scenario before the international readership. This book complies comprehensive information on sucking pests of crops and brings the attention of the readers to this multiple damage causing insect complex. The chapters are contributed by highly experienced Indigenous experts from Universities & ICAR institutes, and book collates useful content for students and young researchers in plant pathology, entomology and agriculture.

Author: G. A. Matthews
Publisher: Oxford University Press, USA
ISBN:
Category : Science
Languages : en
Pages : 624

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Book Description
The cotton plant; Insects and mites; Pest management.