Journal ID : AMA-15-02-2023-12018
[This article belongs to Volume - 54, Issue - 02]
Total View : 410

Title : Incidence and Intensity of Sugarcane Internode Borer Chilo sacchariphagus indicus (Kapur) in Cauvery Delta region of Tamil Nadu and its Management

Abstract :

Experiments were carried out in cane crop planted during April month under wider row planting with single bud setts in Cauvery delta region in Thanjavur district of TamilNadu for three years from 2019 to 2022 to assess the incidence and intensity of internodeborer in sugarcane crop in Cauvery Delta region and to evaluate the sex pheromone traps for mass trapping of male moths of Internodeborer and its effect on sugarcane yield. The incidence and intensity of internode borer was recorded on fornightly basis and consolidated into monthly basis. The weather factors viz maximum, minimum temperature, number of rainy days, rainfall and relative humidity were recorded daily and consolidated on monthly basis. The incidence of internodeborer was correlated with weather factors. Relative humidity (r = 0.013), No of rainy days (r = 0.379) and Rain fall (r = 0.4 89) are positively correlated with incidence of internode borer and negatively correlated with Average temp (r = -0.634). The male moth trapped in sex phermone traps were recorded daily and consolidated in standard week basis and the percent internodeborer damage was recorded in each treatment on 5 th ,7th ,9th and at harvest along with yield. The cumulative internodeborer incidence at harvest revealed that the lowest cumulative incidence of internodeborer incidence of 19.36 percent with 53.88 percent reduction was recorded in 20 traps /ac installed treatments followed by 15 traps /ac in which the internode borer incidence of 25.16 percent with reduction of 33.16 percent was recorded as compared to 37.64 percent in control. The highest cane yield of 97.96 tonnes/ha was recorded in 20 traps /ac installed treatments followed by 15 traps/ac in which cane yield of 92.82 tonned/ha was recorded as against 87.83 tonnes/ha in control. The best CB ratio of 2.34 was recorded in 20 traps /ac installed treatments.

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