Effect of Cyantraniliprole on Feeding Cessation of Q Biotype Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae)

Rameshwar Singh Rattan,Chandni Patel,Hardik Purohit,Vineet Singh,Hector Portillo,Juan M Alvarez,I Billy Annan,Pankaj Suvagia

doi:10.4236/ae.2015.32007

Abstract

The whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae) is one of the most devastating agricultural pests in many cropping systems worldwide. Growers rely on the use of insecticides to control this pest. However, some insecticides do not reduce the feeding of B. tabaci fast enough to prevent the direct and indirect damage produced by this insect. The effect of a new insecticide, cyantraniliprole 10OD (CyazypyrTM), on the feeding of B. tabaci adults, was studied under laboratory conditions. Cyantraniliprole 10OD is an insecticide that belongs to the IRAC Group 28 with a new mode of action for sucking insects, which provides rapid feeding cessation by impairing muscle function, resulting in reduced transmission of important insect vectored crop diseases. Laboratory experiments were conducted to determine the effect of cyantraniliprole along with some other commercially available insecticides on the feeding of B. tabaci adults by measuring the excretion of honeydew as an indirect assessment of insect feeding. In these experiments, cyantraniliprole resulted in significantly higher reduction of honeydew excretion (64.0%) by Q biotype B. tabaci adults during the first 30 minutes of exposure than diafenthiuron, triazophos, acetamiprid and spiromesifen, with all treatments having no adult mortality. Observations between 1 and 48 hours after exposure indicated that cyantraniliprole had numerically higher or similar reduction in honeydew production as the other insecticides, but by 48 hours (mid and high rate) and 96 hours (high rate) of exposure, cyantraniliprole had significantly higher reduction of honeydew excretion than all other insecticides tested. Low adult mortality was observed during first 24 hours of exposure in all treatments. Cyantraniliprole resulted in numerical or significantly higher adult mortality than all other treatments at the later observation intervals (72 - 96 hours). The higher reduction in honeydew excretion by cyantraniliprole appeared to be related to faster feeding cessation during the initial hours of exposure by a combination of feeding cessation and direct mortality as the exposure time increased. These findings document significant effects of cyantraniliprole on feeding cessation in Bemisia tabaci.

Highlights

The cotton or sweet potato whitefly, B. tabaci (Gennadius), is an important hemipteran pest of a vast range of field and greenhouse crops [1]
After 72 hours, a significantly lower amount of honeydew deposition was observed in all cyantraniliprole treatments as compared to rest of the insecticides tested
Honeydew deposition with all cyantraniliprole treatments remained statistically lower than all other insecticides at 96 hours

Summary

Introduction

The cotton or sweet potato whitefly, B. tabaci (Gennadius), is an important hemipteran pest of a vast range of field and greenhouse crops [1]. The pest causes losses of yield and quality directly through feeding damage and indirectly by vectoring plant viral diseases [8]. B. tabaci has been reported to transmit more than 110 plant pathogenic viruses [8] Infection of these B. tabaci transmitted viruses often results in total crop loss [11]. Few insecticides provide control of the insects and reduce disease transmission to satisfactory economic levels. Failures to control B. tabaci have been reported with the development of insecticide resistance to active ingredients from different chemical classes [12]-[19]. Cyantraniliprole is the second active ingredient in the anthranilic diamide class discovered by the DuPont Company, and the first in this class to provide cross-spectrum control of chewing and sucking pests. Cyantraniliprole is classified by the Insect Resistance Action Committee (IRAC) as a ryanodine receptor modulator, in Group 28, and shares this mode of action with two other commercial diamides: chlorantraniliprole and flubendiamide [20]

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Results

Conclusion