| Publication Type: | Journal Article |
| Year of Publication: | 1985 |
| Authors: | A. S. Sidhu, Dhawan A. K. |
| Journal: | Journal of Research Punjab Agricultural University |
| Volume: | 22 |
| Date Published: | 1985 |
| Accession Number: | ZOOREC:ZOOR12200058046 |
| Keywords: | / Punjab; Population density of nymphs on cotton]., activity / / Cotton plant spacings effect on population density of, Amrasca biguttula biguttula; Pectinophora gossypiella [Agricultural, effect on population density of nymphs] [Population changes / / Nymphs, nymphs] [Food plants / / Gossypium hirsutum (cotton); Plant spacings, on cotton; effect of plant spacings] [Population density / / ] [India / |
| Abstract: | Studies were conducted on F 414 variety of hirsutum cotton to observe the effect of two row spacings (60 and 45 cm) in combination with three plant spacings (45, 30 and 22.5 cm) on incidence of cotton jassid (Amrasca biguttula biguttula (Ishida) and pink bollworm (Pectinophora gossypiella (Sand)). The jassid injury increased in 45 cm row spacing. The jassid population was non-significant in 60 .times. 45 and 60 .times. 30 cm spacings. The incidence of pink bollworm was also low in these two spacings. Similarly, the yield of seed-cotton was significantly more in 60 .times. 45 cm and 60 .times. 30 cm than in 45 .times. 45, 45 .times. 30 and 45 .times. 22.5 cm spacings. There was no significant increase in yield in any other spacing as compared with standard spacing of 60 .times. 45 cm. The increase in plant population by changing plant to plant and row to row spacing failed to decrease the bollworm damage and increase in yield of seed-cotton. |
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