Volume 3 No. 2 April – June 1981

Dolores L. Alcober ABSTRACT The innovative performance of coconut farmers in Leyte and Southern Leyte was determined. The respondents had an average age of 52 years with an average farming experience of 23 years. Their mean educational attainment was 5 years; average number of household members, 6, and an average annual income of P5,969.47. Majority …

Innovative Performance of Coconut Farmers in Leyte and Southern Leyte, Philippines Read More »

C.A. Eronico, R.G. Escalada and R.M. Trenuela ABSTRACT Storing cuttings of BNAS-51 variety of sweet potato for 15 days caused significant decrease in leaf area index (LAI) during the first two months after planting. However, there were no significant variations in LAI and fresh herbage at harvest. Generally, plants that originated from the unstored cuttings …

Effects of Different Portions and Length of Storage of Cuttings on the Growth and Yield of Sweet Potato Read More »

Rodolfo G. Escalada ABSTRACT Pruning and intercropping affected plant height and fresh herbage yield of ipil-ipil. Both parameters declined as the crop was cut back periodically. Plant population also compounded the effect. At high plant population, the pruned plants developed thin and elongated stems which reduced herbage yield per plant per unit area. However, the …

Manipulation of Cultural Practices for ipil-ipil and Its Effect on the Intercropped Cassava Read More »

A. L. Acedo Jr., E. C. Manoto and O. K. Bautista ABSTRACT The use of ethylene dibromide (EDB) and phostoxin in controlling sweet potato weevil was evaluated. Larvae and pupae were effectively controlled when EDB was used at the rate of 32 ml/cu m. However, phostoxin at 10.5 tablets/cu m was more effective than EDB …

Post-harvest Fumigation of Tubers for the Control of Sweet Potato Weevil Read More »

E. H. Estrada and M. K. Palomar ABSTRACT Two-week old groundnut seedlings (Coronadal variety) were inoculated with rust, Puccinia arachidis Speg. and mottle virus alone or in combination, either simultaneously or a week earlier than the other. Plant height was significantly reduced in plants inoculated with rust a week earlier than the virus but was …

Effect of Rust and Mottle Virus Infection on the Growth and Yield of Groundnut Read More »

Lualhati M. Noriel ABSTRACT Rice seedlings of C-168 cultivar were markedly inhibited by butachlor up to shoot emergence stage while those of IR-36 showed greater inhibition up to the second leaf stage. Treated rice seedlings up to shoot emergence stage have comparatively less weights than the untreated control in both cultivars. Protein synthesis was severely …

Effect of Butachlor on the Protein Content of C-168 and 1R-36 Rice Cultivars at Different Growth Stages Read More »

O. C. E. Diongzon, Jr. and D. P. Gapasin ABSTRACT The biology of taro hornworm, Hippotion celerio L., was studied in the laboratory. The eggs were laid singly or in groups on the nether surface of the leaf. Incubation period of eggs was from 3 to 5 days with 97% hatchability. The total developmental period …

Biology of Taro Hornworm, Hippotion celerio L. Read More »

Ruben M. Gapasin ABSTRACT Pre-plant treatment of different nematicides, in pot experiments, using the manufacturers’ recommended rates had variable effects on the growth of sweet potato and cassava and on the population of Meloidogyne incognita and Rotylenchulus reniformis 4 months after application. Low gall and egg mass ratings were obtained in chemical-treated plants, except those …

Control of Meloidogyne incognita and Rotylenchulus reniformis and Its Effect on the Yield of Sweet Potato and Cassava Read More »

Nelson M. Esguerra and Frank H. Haramoto ABSTRACT The potential importance of the western predatory mite, Galendromus occidentalis Nesbitt in the management of the carmine spider mite, Tetranychus cinnabarinus (Boisduval) was evaluated during a 1-year period on papaya trees at Kapaa, Kauai, Hawaii. One summer spray of Vendex at 0.56 kg Al/ha allowed some western …

Integrated Control of the Carmine Spider Mite on Papaya Read More »