Two methods of controlling large-leaved privet (L. lucidum) and small-leaved privet (L. sinense) were studied: poisoning of standing trees and physical removal. Large-leaved privet regenerated rapidly from cut stumps but not from lateral roots once the stump had been removed. Both species can be...

The lophopid Pyrilla perpusilla is now established on sugarcane in many districts of Sind province, Pakistan. Surveys in 1982 indicated that egg parasites checked populations of the pest in Mirpurkhas District, but that the pest overcame controls by natural enemies in parts of Nawabshah District....

Observations were made of the distribution and periods of activity of the crucifer pest Pieris brassicae in different parts of Pakistan and of its behaviour and development in the laboratory. Preferred food-plants in the field were cabbages and cauliflowers, but it also attacked kale, knolkhol...

A. helianthi was isolated from sunflower plants with brown leaf and stem lesions in a survey at the Cent. during autumn 1982.

Isolations from seed samples yielded Alternaria alternata (frequency 2.7%), Ascochyta lentis (27.9%), Fusarium equiseti (2.5%) and F. moniliforme [Gibberella fujikuroi] (2%). With the exception of A. alternata, all are new records on lentil seeds in Pakistan. A. lentis was pathogenic to lentil...

Larvae of Autographa nigrisigna were collected from gram (Cicer arietinum) in Pakistan and reared in the laboratory. The duration of the larval stages was 18-30 days, that of the prepupal stage 1-3 days and of the pupal stage 5-13 days. Adult males had a lifespan of 4-5 days and females 7-19 days....

Moderate temp. (20-26°C) with high RH (90%) favoured development of bacterial stripe caused by Pseudomonas andropogonis. High (24-36°) and low (16-22°) temp. limited disease development. Bacterial leaf blight caused by P. avenae increased under hot, moist conditions (24-36° and 90% RH).

C. cucurbitarum was isolated from a severe pod rot in 1983 and pathogenicity confirmed.

Of the 107 maize accessions screened against Erwinia pv. chrysanthemi in the 1985 wet season following inoculation 30-32 days after field emergence, 8 were resistant (0-10% lodging), 61 susceptible and 38 intermediate. Of the 208 accessions screened in the 1986 dry season, 30 were resistant, 39...

An isolate obtained from infected plants in Tuao, Cagayan Valley, was identified as race 14 using 7 differential cotton lines. A large number of local and introduced lines and varieties were screened for resistance of the leaves, stems and bolls. Of 136 screened for resistance to bacterial leaf...