Comparison of Integrated Pest Management Technique used to Control the Diamondback Moth, Plutella Xylostella on Cauliflower Brassica Oleracea (Published)
The diamondback moth (DBM) Plutella xylostella L. is the most significant pest of cruciferous crops worldwide. The present research was conducted to control it on the cauliflower, Brassica oleracea L. by 5 Integrated Pest Management (IPM) techniques compared with control (untreated) at Agricultural Research Station Baffa, Mansehra, Pakistan. The Randomize Complete Block Design was used for the experiments with 3 replications. For intercropping, the coriander, Coriandrum sativum L.; for chemicals control, the lorsban; for neem seeds extract and oil, Azadirchata indica Juss and for biological control, the stingless wasp, Trichogramma chilonis Ishii were used. The DBM density increased with increased of temperature, therefore, it was the highest (31.0В±0.2 larvae/plant; n=6) at the maximum temperature, i.e., 35 В°C in 4th week. No parasitism was found until 2nd week, however, the highest (47%) was during 7th week, moreover, it was 5% at the end of 8th week (n=6). During parasitization, DBM population density was 23.8В±2.6, however, mummies and adult parasitoids were 3.1В±1.4, moreover, mean parasitism was 13.0В±1.7. The actual lowest DBM density was compared, obtained by application of 5 IPM techniques (n=6): A. indica seeds extract (T3): 2.1 larvae/plant in 8th week < chemicals control (T2): 3.5 larvae/plant in 1st week < biological control (T5): 4.7 larvae/plant in 5thth week = intercropping (T1): 4.7 larvae/plant in 8th week < A. indica oil (T4): 6.6 larvae/plant > control (T0): 35.6 larvae/plant both in 1st week. The lowest yield of B. oleracea was obtained in control (2.9 ton/ha), however, the highest was by A. indica seeds extract (29.1 tons/ha). Therefore, it is recommended that A. indica seeds extract can be used by farmers against DBM in order to get the highest yield and the lowest infestation.
Keywords: Azadirchata Indica Juss Oil, Azadirchata Indica Juss Seeds Extract, Biological Control, Brassica Oleracea, Intercropping, Lorsban, Plutella Xylostella, Trichogramma Chilonis