Claim · model-written summary
Jassid incidence was higher on hybrids than varieties.
Gossypium hirsutumVerbatim
e0“Higher incidcnces of ,iassids and aphids and their predators were observed on the hybrids than the varieties.”
t0“cotton”
Title
S. Vennila; V. K. Biradar; P. R. Panchbhai; et al. Journal of Biological Control 2007. doi:10.18311/jbc/2007/15037
Other claims from this paper (16)
- Observation Jassid incidence ranged from 2.4 to 7.5 nymphs per three leaves.
- Observation Aphid infestation ranged from 15.0 to 38.9 percent.
- Observation Coccinellid activity ranged from 0.1 to 0.4 per plant.
- Observation Chrysopid activity ranged from 0.52 to 1.87 per plant.
- Observation Chrysopids had a more persistent population than coccinellids.
- Association The predator populations were positively but nonsignificantly associated (r=0.058).
- Association Aphid incidence was higher on hybrids than varieties.
- Association Predator incidence was higher on hybrids than varieties.
- Association Long-term soil fertility changes had no direct influence on predators.
- Association Sole cropping had 1.83 chrysopids per plant, higher than soybean intercropping.
- Association Sole cropping had 0.99 coccinellids per plant, higher than soybean intercropping.
- Association Aphid infestation was 19.2% in sole cotton versus 24.2% with soybean intercropping.
- Observation Coccinellids occurred discontinuously under protected and unprotected conditions.
- Observation Chrysopids continued to occur from August through November.
- Observation Both predators recolonized after insecticidal sprays.
- Recommendation The authors recommend designing cotton ecosystems that favor predation by native predators.