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JAAST Table of Content: November 1(3)

Research Articles

 

YIRZAGLA JULIUS.     pp. 28 - 31

Effect of spatial arrangement on the performance of Pearl millet-Cowpea Intercrop

 

           

Spatial arrangement of crops is critical in determining the growth and yield of intercrops. The productivity of four spatial arrangements of pearl millet-cowpea intercrop was studied from June to October 2010 in the Sudan savannah zone of Upper East Region of Ghana. The intercrop row arrangements were: one-row millet: one row cowpea (1M:1C), two-row millet : one row cowpea (2M:1C), two-row millet : two-row cowpea (2M:2C) and two-row millet : four-row cowpea (2M:4C). There were also the sole crop arrangements of millet and cowpea that formed the basis for comparison with the other arrangements. Even though yields of the intercrop components were lower than their sole crop counterparts, the intercrop components were more productive than the sole crop components as evidenced by the Land Equivalent Ratios (LERs) which ranged from 1.27 to 2.31. The results of the study showed that one row of millet to one row of cowpea (with millet planted 2 weeks before cowpea) yielded better than the other spatial arrangements.

Keywords:  Land Equivalent Ratio, row arrangement, pearl millet, cowpea

 


SAJJAD ALI KHUHRO, HAKIM ALI SAHITO*, ABDUL GHANI LANJAR, SAEED AHMED KHUHRO and ABDUL WAHEED SOLANGI.  pp. 32 - 36

Carnivores Spiders Fauna in Lady's Finger, Abelmoschus Esculantus Vegetable Crop.

 

           

Study was carried out in the vivo condition of okra vegetable crop for checking the predatory spiders on okra in the experimental area of Sindh Agriculture University, Tandojam during Kharif season, 2013. Okra crop was planted on February 15, 2013 in a row trial at 75 cm distance between row to row with 22.5 cm distance between plant to plant. The results revealed that population of predatory spiders varied between the crop seasons. The peak population of predatory was observed during the month of May and reached up to 8.00±0.33/plant. The feeding potential of predators in the laboratory condition was recorded where; wolf spider consumed (75.00%) mites, followed by fishing spider (60.50%) mites, yellow sac spider (55.00%) mites and false black widow spider (40.00%) whiteflies. The predatory spiders preferred mites than whitefly, thrips and jassid under laboratory conditions at temperature of 25±2ºC. The correlation of population of predatory spiders was positive and significant with temperature (r=0.475) while, positive and nonsignificant with relative humidity (r=0.078).

Keywords: Sucking pests, Temperature and RH%, Carnivores, Lady’s finger