Monitoring and forewarning of Helicoverpa armigera, leucinodes orbonalis, scirpophaga incertulas and Spodoptera litura in western U.P
2010
Prasad, C.S. | Tiwari, G.N.
A study was made on monitoring and forewarning of Helicoverpa armigera, Leucinodes orbonalis, Scirpophaga incertulas and Spodoptera litura at CRC and HRC, S.V.P. Uni. of Agric. & Tech., Meerut. The maximum population of H. armigera (85 moth/trap/week) was recorded in 19ᵗʰ SW (2ⁿᵈ week of May 2006), L. orboinalis (19.33 moth/trap/week) in 45ᵗʰ SW (1ˢᵗ week of November 2005) and next successive higher population 16.0 moth/trap/week (3ʳᵈ week of May 2006) was recorded in present experimental observation and no moth catches was recorded in severe cold months. S. Incertulas (8.0 moth/trap/week) In 36ᵗʰ SW (2ⁿᵈ week of September 2006) and the population of this pest was active from 32ⁿᵈ SW to 47ᵗʰ SW. 5. litura (765.33 moth/trap/week) was recorded in 19ᵗʰ SW (2ⁿᵈ week of May 2006), this Insect pest was observed throughout the year. In present investigation it's also observed that the weather factors play an important role in the population build up of the different insect pests. Moth catches of H. armigera population showed significant positive correlation with maximum temperature, while significantly negative correlation with RH. The moth catches of L. orbonalis revealed ignificant positive association with maximum and minimum temperature. In case of S. incertulas, moth catches showed non-significant correlation with weather factors. The population of S. litura revealed a significantly positive correlation with maximum temperature but RH showed significant negative correlation.
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