Citrus Research Report 2006
ABOUT THE COLLECTION
The Citrus Report, first published in 1978, is one of several commodity-based agricultural research reports published by the University of Arizona. The purpose of the report is to provide an annual research update to farmers, researchers, and those in the agricultural industry. The research is conducted by University of Arizona and USDA-ARS scientists.
Both historical and current Citrus Reports have been made available via the UA Campus Repository, as part of a collaboration between the College of Agriculture and Life Sciences and the University Libraries.
Contents for Citrus Research Report 2006Insect Pest Management
- Pollination of W. Murcott Afourer Mandarins
- Lemon Rootstock Trials in Arizona - 2006-07
- 'Lisbon' Lemon Selection Trials in Arizona - 2006-07
- Results of New Cultivar Selection Trials for Lemon in Arizona - 2006-07
- Cultivar Selection Trials of Navel Orange in Arizona for 2006-07
- Mandarin Selection Trials in Arizona - 2006-07
Mandarin Selection Trials in Arizona - 2006-07Third year yield and packout data from a trial containing 'Fina', 'Fina Sodea', 'Sidi Aissa', 'Oroval', 'W. Murcott Afourer', 'Fremont', and 'Gold Nugget' selections were collected in 2006-07. For the year, 'Fina Sodea' had the greatest yield, and average fruit size, while 'Gold Nugget' had the smallest yield, and ‘Fremont’ had the smallest fruit size.
Cultivar Selection Trials of Navel Orange in Arizona for 2006-07Two orange cultivar trials have been established in Arizona, one at the Yuma Mesa Agricultural Center, Yuma, AZ and one at the Citrus Agriculture Center, Waddell, AZ. For the navel orange trial in Yuma, all the selections had reduced yields in 2006-07. 'Fisher' navel continues to have the greatest yield. Of the rest in the Yuma trial, 'Lane Late' had the best quality and yield. For the Waddell trial, the fourth year data has been collected, and suggests that 'Fisher', 'Beck-Earli' and 'Lane Late' are outperforming the other cultivars tested to date.
Results of New Cultivar Selection Trials for Lemon in Arizona - 2006-07Three lemon cultivar selection trials are being conducted at the Yuma Mesa Agriculture Center in Somerton, AZ. Data from these trials suggest that 'Limonero Fino 49' and 'Cascade Eureka' selections may be a suitable alternative for the varieties most commonly planted in Southwest Arizona today. 'Femminello' and 'Villafranca' might also be planted on an experimental basis
'Lisbon' Lemon Selection Trials in Arizona - 2006-07Four 'Lisbon' lemon selections, 'Frost Nucellar', 'Corona Foothills', 'Limoneira 8A' and 'Prior' were selected for evaluation on Citrus volkameriana rootstock. Yield was extremely low for 2006-07, but these results do not change the fact that that 'Limoneira 8A Lisbon' and 'Corona Foothills Lisbon' are superior to the other two selections tested.
Lemon Rootstock Trials in Arizona - 2006-07In a rootstock evaluation trial planted in 1993, five rootstocks, 'Carrizo' citrange, Citrus macrophylla, 'Rough Lemon', Swingle citrumelo and Citrus volkameriana were selected for evaluation using 'Limoneira 8A Lisbon' as the scion. 1994-2006 yield and packout results indicate that trees on C. macrophylla, C. volkameriana and ‘Rough Lemon’ are superior to those on other rootstocks in both growth and yield. C. macrophylla does not consistently outperform C. volkameriana. 'Swingle' and Carrizo’ are performing poorly.
Use of Plant Growth Regulators for Improving Lemon Fruit Size - 2006Lemons were treated with several plant growth regulators for the 2006-07 season, with the hope of improving fruit size. These PGR’s included Bluestim, Accel, Maxim and MT1350. Although there were some increases in yield, these were just trends, and were not statistically significant. Similarly, there was no improvement in fruit size with application of the treatments.
Chemical Control and Integrated Pest Management of Woolly WhiteflyEight foliar insecticide treatment regimes (single applications of Esteem, Danitol + Lorsban, Applaud, Provado and Prev-am, and two applications of Applaud, Provado, and Prev-Am) were evaluated for management of woolly whitefly infestations in grapefruit. All of these products demonstrated efficacy in mitigating woolly whitefly populations. Danitol + Lorsban appeared to be the best knock-down treatment evaluated, but Provado and Prev-Am also demonstrated good activity. For sustained control, all of the treatments were effective; however, Prev-Am required an additional application to achieve equivalent control. Soil injections of 16 and 32 fl-oz/ac of Admire were very effective against WWF, and there were no detectable differences between the two rates. The Admire appeared to require about 27 days after injection to demonstrate consistent activity.