Biology and Management of Shoot And Fruit Borer, Earias vittella (Fab.) On Okra

Abstract

During the kharif seasion 2009, A field experiment was conducted on okra at Crop Research Center and Departmental laboratory, Sardar vallabhbhai Patel University of Agriculture and Technology, Modipuram, Meerut. The studies on biology of shoot and fruit borer, E. vittella was recorded on okra at the different stage of Earias vittella during the kharif season. The two generation of the Earias vittella were reared. First during July-August and Second during October- November 2009 and various life history parameters were recorded for comparison in incubation period and Hatchability percentage of egg, larval duration, Pupal duration and adult duration. This information will be helpful in planning pest management practices for this crop. The fauna associated with okra crop at Modipuram, Meerut was evaluating the main goal of this experiment and efficacy of different manner of insecticides against shoot and fruit borer, Earias vittella Fab. The experiment comprised of nine treatments laid out in randomized block design with three replications. At the time of observations of field, the nine insect species were recorded. Among them, okra shoot and fruit borer, Earias vittf;JI/a Fabricius (July end to October end) was observed the major pest of okra crop. The cotton jassid Amarsca biguttul/a biguttulla Ishida (August to September) and white fly, Bemisia tabaci Gennadius (August beginning to September end) were found moderately damaging the crop. The other insect pests recorded on the crop were of less importance and extent of their damage was found without much economic loss.The application of the different insecticides against shoot and fruit borer, E. vittella. The results revealed that the all insecticides were effective against shoot and fruit borer, Earias vittella Fabricius and reducing the shoot and fruit infestation over the control plot. The indoxacarb was most effective against shoot and fruit borer, E. vittella in okra. The highest yield (93.26 q.ha) and highest cost benefit ratio (9.9) were obtained from the indoxacarb, followed by carbosulfan, lambda cyhalothrin and cartap hydrochloride. The schedule of application of the insecticides was 7 days and 14 days after each spray