Functional Response and Density-Dependent Predation of Apertochrysa astur (Banks) (Neuroptera: Chrysopidae) on the Rugose Spiralling Whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae)
Mohitha Reddy J. *
Dr. YSR Horticultural University, Venkataramanagudem, West Godavari, Andhra Pradesh-534101, India.
Chalapathi Rao NBV
Dr. YSR Horticultural University, Venkataramanagudem, West Godavari, Andhra Pradesh-534101, India.
Viji C. P.
Dr. YSR Horticultural University, Venkataramanagudem, West Godavari, Andhra Pradesh-534101, India.
Anoosha V.
Dr. YSR Horticultural University, HRS-Ambajieta, Andhra Pradesh, 533221, India.
Govardhan V.
Dr. YSR Horticultural University, HRS-Ambajieta, Andhra Pradesh, 533221, India.
*Author to whom correspondence should be addressed.
Abstract
Functional response and density dependent feeding interaction of Apertochrysa astur to different densities of eggs, nymph, pupa and adults of Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae) (RSW) was studied at HRS, Ambajipeta. All the instars showed highest consumption percentage at low densities when eggs, nymphs, pupa and adults were offered. First instar showed no response for RSW pupa and adults. Among the three instars, third instar was found to be more effective in feeding all the stages of RSW. Results revealed that the linear coefficient of functional response equation for all A. astur stages and all stages of the RSW was negative and significantly different from zero (P < 0.01), confirming a Type II functional response. Across varying densities of RSW eggs, nymphs, pupae and adults, A. astur consistently exhibited a Type II functional response, with the third instar demonstrating the greatest predatory efficiency.
Keywords: Rugose spiraling whitefly, feeding potential, Apertochrysa astur, biological control