Effect of Sowing Dates of Three Cowpea Cultivars on Their Infestation Rate With Cowpea Pod Borer Etiella Zinckenella

Abstract

Field trials were conducted during 2005 and 2006 seasons at Minofia governorate to evaluate the effect of planting date of three cowpea cultivars on their infestation rate with cowpea pod borer, Etiella zienckenella. For each cowpea cultivar planted at each tested date, the numbers of bores and larvae were counted in green and dry pods as well as in dry seeds and the means were obtained to estimate the degree of insect infestations. Results indicated that, regardless the planting date in both seasons, Kream7 was the highest resistant cultivar to insect infestation followed by Kaha1 and then Kafr El Shikh1. On the other hand, regardless the cowpea cultivar, the rate of insect infestation was greatly reduced at the early plantation. Thus, selection of Kream7 cultivar and early plantation could be involved in reducing E. zinckenella infestation and subsequently increase the cowpea yield. These studies clearly demonstrated that several non-insecticidal approaches have great potential for cowpea pod borer Etiella zinckenella management. These approaches include some of integrated pest management strategies which can effectively prevent or reduce infestation.

Effect of Planting Dates and Certain Insecticides on the Lima Bean Pod Borer, Etiella zinckenella (Treit.) (Lepidoptera: Pyralidae) and Productivity of Cowpea Plants in Qalyoubia Governorate.

“…The present results agree with those of Ekesi et al (1996) and Helalia et al (2011), they stated that the earliest planting date produced significantly high weight of yield. Singh (1999) indicated that cowpea pod borer, E. zinckenella was an important pest and was the main causes of yield losses.…”

“…He concluded that planting date is an important factor for crop production as well as pod-borer infestation level. Helalia et al (2011) stated that early plantation could be involved in reducing E. zinckenella infestation and subsequently increase the cowpea yield.…”

“…Thus, the whole pods are destroyed during the crop's reproductive stage resulting considerable loss of yield at harvest (Sukul, et al 1989). Metwally,1993 andHelalia, et al, 2011; studied the effect of sowing dates on their infestation rate with cowpea pod borer Etiella zinckenella. Also, Gehan andAbdalla, 2006 andMahmoud, 2011 evaluated some selected pesticides against the two pod borers Helicoverpa armigera and E. zinckenella infestation in cowpea.…”

Effect of Planting Dates on Infestation with Certain Pests and Yield of Cucumber Plants During Fall Plantation in Giza Governorate.

“…The present results agree with those of Saglan and Yasgan (1999), on cucumber recorded that the highest yield (17.53 t/ha) was obtained from the first sowing date in July and from the 3 days harvesting interval. Ekesi et al (1996) and Helalia et al (2011), on cowpea, they stated that the earliest planting date in July produced significantly high weight of yield. Also, Seham et al (1997) and Mohamed (2011) concluded that the different planting date during year effect on the yield, as soon as in the present study.…”

Effect of Planting Dates on Major Insect Pests and Yield of Watermelon Seeds (Citrullus lanatus.) in Kafr El - Sheikh Governorate

“…The present results agree with those of Saglan and Yasgan (1999), on cucumber recorded that the highest yield (17.53 t/ha) was obtained from the first sowing date in July and from the 3 days harvesting interval. Ekesi et al (1996) and Helalia et al (2011), on cowpea, they stated that the earliest planting date in July produced significantly high weight of yield. Also, Seham et al (1997) Mohamed (2011 and Shaalan H. S. (2016) concluded that the different planting date during year effect on the yield, as soon as in the present study.…”