Search Results

You are looking at 1 - 3 of 3 items for

  • Author or Editor: Raúl L. Grijalva-Contreras x
  • All content x
Clear All Modify Search
Free access

Raul L. Grijalva-Contreras, Arturo Lopez-Carvajal, Manuel J. Valenzuela-Ruiz, Rogelio A. Juarez-Gonzalez, and Fabian Robles-Contreras

The total shell almond production in northwestern area in Mexico is ≈80 tons per year; therefore, almond fruit tree would be a potential fruit crop in this agricultural area. Also, this crop offers some advantages with lower costs than other fruit crop, and the water requirement needs for almond trees is low in support to the limited water availability. Our objective was to test new five almond cultivars of low chilling requirement. Almond cultivars were grafted on Nemaguard rootstock and planted during 1990. The data were collected from the almond orchard using the inshell kernel. The average yield during 1993 and 1994 were 970, 602, 552, 419, and 388 kg·ha–1 for `R-633', `Cavaliera', `Constantini', `Um El Fahm', and `Rane', respectively. `Cavaliera' and `Um El Fahm' showed good inshell percent and kernel weight. `Cavaliera' was harvested early in last week of June compared to the other cultivars that were harvested in mid-July.

Free access

Gerardo Araiza-Celaya, Eduardo Liñeiro-Celaya, Raúl L. Grijalva-Contreras, Francisco López-Vilchez, Victor Salvador-Rivas, and Fabián Robles-Contreras

Vegetable production in the Caborca area is about 6500 ha, and the main crops are asparagus, muskmelon, watermelon, and pea. However during 1999, some growers tested green snap beans as a new crop for this area. The objective of this experiment was to evaluate five green snap beans with round podded (`Benchmark', `Landmark', `Jade', `Probe', and `Prosperity') and two densities (14 and 28 seeds/m) on subsurface drip irrigation system. The sowing was on beds of 2.0 m with two rows separated 60 cm. The date sowing was on 7 Sept. 1999. The first cutting were between 65 and 70 days after sowing in all varieties; in this case `Benchmark' was the earliest. The cumulative yield were 330, 140, 87, 63, and 20 boxes/ha (30 lb/box), respectively, in four harvests. On the other hand, the high population yielded 14.4% more than the low population. All varieties were damaged by frost that ocurred on 22 and 23 Nov. `Prosperity' was more susceptible to mosaic virus and `Benchmark' more tolerant. The pod quality distributions were 19.9%, 21.5%, 26.1%, and 21.0% for classes 1, 2, 3, and 4, respectively. We have not seen any important insect pests during this trial.

Free access

Raul Leonel Grijalva-Contreras, Victor Avilez-Peraza, Adan Fimbres-Fontes, Ruben Macias-Duarte, and Jose L. Miranda-Blanco

Pear production in Mexico is low; there are about 4500 ha. One of the main problems in this tree fruit is the unknown number of new varieties for each area. The objective of this study was to evaluate 23 common pear cultivars and seven Asian pears. The experiment was carried out at the Experimental Station “El Tasicuri” of Magdalena, Sonora, Mexico. The trees were planted in 1990 on Pyrus calleryana rootstock. The main results were that common pears were not adapted to the area because of the lack of cold weather; however, `Bartlett' was the only cultivar that was adapted. Asian pears showed good adaption into the region (`Shinseiki', `Kikusui', `Hosoui', `Twenty Century', and `Ya-Li'). The ripening date of these cultivars were from the 7 and 20 of Aug. and the weight of the fruit was 146 and 198 g/fruit. There were no pests or diseases in any of the Asian cultivars.