Population Dynamics of Whitefly and Thrips under Different Row Spacing and Plant Density Conditions in a Cotton Field of Punjab, Pakistan
Population Dynamics of Whitefly and Thrips under Different Row Spacing and Plant Density Conditions in a Cotton Field of Punjab, Pakistan
Abid Mahmood Alvi1*, Naeem Iqbal1,2, Javid Iqbal3, Kazam Ali4, Muhammad Shahid1, Waqar Jaleel5,6,7, Hafiz Azhar Ali Khan8 and Tiyyabah Khan8
ABSTRACT
In the current study, populations of whitefly (Bemisia tabaci) and thrips (Thrips tabaci) were observed in 2016 under three different conditions: 75 cm row to row spacing without mapiquate chloride (growth inhibitor), 30 cm row to row spacing without mapiquate chloride, and 30 cm row to row spacing with mapiquate chloride, using two cotton varieties (BS-15 and BS-70). The results indicated that the population of both sucking pests was more on variety BS-70 as compared to BS-15 cotton variety. Thrips and whitefly populations varied significantly in three row spacings (P<0.01) with the maximum population recorded in line spacing of 30 cm without mapiquate chloride (9.12-11.15 thrips/leaf and 9.18-7.83 whitefly/leaf), followed by line spacing of 75 cm without mapiquate chloride (8.65-9.12 thrips/leaf and 5.97-5.06 whitefly/leaf) and 30 cm with mapiquate chloride (4.57-5.41 thrips/leaf and 2.64-2.88 whitefly/leaf). The peak population was observed on June 5, 2016 for thrips (15.46-27.53 nymphs and adults/leaf) and August 29, 2016 for whitefly (11.40-20.80 nymph and adults/leaf).
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April 2021
Vol. 53, Iss. 2, Pages 401-800
