SEASONAL INCIDENCE OF DIAMONDBACK MOTH FOR SOME CRUCIFEROUS VEGETABLES
The diamondback moth (DBM) Plutella xylostella (Linnaeus) is an economically important pest of cruciferous crop in West Bengal, India. An extensive work is carried out at Agricultural Training Centre / State Agricultural Management and Extension Training Institute, Narendrapur, West Bengal regarding study of seasonal incidence of DBM for some cruciferous vegetables viz. green cabbage, red cabbage, Chinese cabbage, cauliflower and broccoli during two seasons i.e. 2013-14 and 2014-15. Early, mid-season and late varieties for all the vegetables were cultivated at institute’s farm in three separate plots. The weather parameters such as maximum and minimum temperature, humidity, rainfall etc for the whole season were taken from the local meteorological observatory. The incidence of diamondback moth in all the vegetable plots was correlated with the weather data. The noticed incidence of larval population in terms number per plant was ranging from 0.20 to 5.20, 0.13 to 4.20, 0.13 to 4.66, 0.13 to 4.20 and 0.20 to 0.40 in 2013-14 and 0.13 to 5.60, 0.13 to 4.46, 0.13 to 4.20, 0.20 to 4.00 and 0.40 to 0.60 in 2014-15 for green cabbage, red cabbage, cauliflower, broccoli and Chinese cabbage respectively. Again, the above pests’ incidence of larvae per plant was less in case of Chinese cabbage (0.20 to 0.60) than that of broccoli, red cabbage, cauliflower and green cabbage for two consecutive seasons. Hence, green cabbage was considered as preferred host plant for DBM incidence.
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.