OCCURRENCE OF TRICHOGRAMMA SPP. UNDER FIELD CONDITIONS IN ORGANIC AND CHEMICALLY TREATED TOMATO CROP BY USING SENTINEL CARDS, AT RAIPUR, CHHATTISGARH, INDIAANJALI MANHAR, ROHIT KUMAR, JAIMALA BARWA, R.N. GANGULI AND JAYALAXMI GANGULIAbstract This experiment was carried out with the objective to record the naturally occurring Trichogrmma species under field condition and also to find the colour preference for egg laying in Chhattisgarh crop field organic and chemically treated tomato crops at IGKV, Raipur, Chhattisgarh during the year 2021-2022. The result from the experiment showed that the mean maximum population of Trichogramma in organic and chemical fields were seen during the months of February and March (i.e., 13.5 and 9.38 numbers), and the lowest mean population were recorded during the month of April (1.56 and 1.00 numbers respectively). The most common colour preferred by T. chilonis under field conditions was blue, which was observed with mean population of 14.13 numbers in organic field and it was 9.69 numbers on yellow cards in the chemically treated field. The colour which was least preferred was white where mean parasitization were recorded as 4.06 and 1.88 numbers in organic and chemically treated tomato field, respectively. The species of Trichogramma collected from the organic tomato field was identified on T. chilonis. |