Survey Of Pests Research Articles

A survey of pests of farm-stored bulk wheat in Canterbury

A survey of pests of farm-stored bulk wheat in Canterbury

A Survey of Insect Pests Living in the Peanuts Confectionery and Chocolate Storehouse

A Survey of Insect Pests Living in the Peanuts Confectionery and Chocolate Storehouse

Sample Surveys of Pests and Diseases of Tea in North-East India

SUMMARYPests and diseases cause appreciable loss to tea in north-east India, but their incidence and intensity of attack vary widely from district to district, and within districts with variation in climate, elevation and the jat (seed-source) of tea. For example, blister blight is a serious disease in Darjeeling and looper catepillar is mainly localized in certain tea estates of the Assam valley. Thus recommendations regarding pesticides and their application in a particular region must be based on a thorough knowledge of the distribution of the diseases or pests in the region. This can best be obtained through sample surveys, planned in representative estates of the region and carried out with the help of trained investigators. Such surveys will also provide basic data on jat, environment and disease, as a guide to experimentation.

Sample Surveys of Pests and Diseases of Tea in North-East India

SUMMARYPests and diseases cause appreciable loss to tea in north-east India, but their incidence and intensity of attack vary widely from district to district, and within districts with variation in climate, elevation and the jat (seed-source) of tea. For example, blister blight is a serious disease in Darjeeling and looper catepillar is mainly localized in certain tea estates of the Assam valley. Thus recommendations regarding pesticides and their application in a particular region must be based on a thorough knowledge of the distribution of the diseases or pests in the region. This can best be obtained through sample surveys, planned in representative estates of the region and carried out with the help of trained investigators. Such surveys will also provide basic data on jat, environment and disease, as a guide to experimentation.

Recent Trends in Forest Entomology

the classic population dynamics studies on the spruce budworm reviewed by Morris (75), the newly recognized importance and application of behavioral differ­ ences in population dynamics studies (131), and new application of computer techniques (75, 127, 128) were based on forest entomological work, and forest entomologists have had considerable influence on their development. The wid ening scope of forest entomology is also reflected in other recent reviews and major publications. The fields of ecology (35, 94), sampling (74), biological control (5, 61), chemical control (7, 30), systematics (46, 47, 137), physiology and behavior (31, 132), and various forestry techniques such as photogrammetry (39, 40, 129), mensuration, and tree growth studies (76), have all been advanced through the efforts of scientists working on forest insect problems. One of the most monumental surveys of pests of a particular crop is moving into its third volume-The Forest Lepidoptera of CanadaL-which, hopefully, wi11 lead to comparable lists for all forest insects. These various studies indicate a strong trend toward specialization and as pointed out by Balch (6) this emphasizes the need for more integrated studies. There are many such programs now in existence in forest entomo­ logical work and the need for the synecological approach is being recognized. The sheer volume of literature on forest entomology is, at times, positively frightening. However, it is of great interest to see the new names and locations now appearing in our abstracting journals. Not too long ago, the bulk of the literature on forest insects was confined to North America and Germany. Articles appearing from Israel, South America, and Africa were written largely by the perambul ating professors. Now, however, a casual survey of Forestry ·Abstracts yields references to workers from Argen­

Development of Callosobruchus chinensis in Certain Vegetable Seeds

Unlike other insects associated with stored grains and seeds, the pulse beetle, Callosobruchus chinensis is rather specific in its food habits. The natural hosts of this species have been listed by Chittenden (1898), Lefroy (1909), Fletcher (1914), Rao (1917), Fletcher and Ghosh (1919), Black (1922), Ghosh (1937) and Pruthi and Singh (1950). In India it has been found to feed only on a particular group of host seeds belonging to the Natural Order Leguminosae. During surveys of insect pests of vegetable seeds in stores and certification of the vegetable seed samples, this pest has been intercepted from almost every kind of the important leguminous vegetable seeds. It was observed that this beetle laid eggs freely in. all such seeds but its further development in these seeds was not uniform, which was also noticed by Ghosh (1937). In some, it developed very fast while in others it could hardly subsist and even died without entering the seed.

The Agricultural Pests of the Southern Provinces, Nigeria

The following notes embody the results of observations made during a year of service (May 1913 to May 1914) as the Entomologist in the Agricultural Department of the Southern Provinces, Nigeria. They do not, however, pretend to cover more than a very limited area of the Western Province, for on account of the desirability of beginning the work by making myself acquainted with local conditions by a careful study of the insect problems at the head-quarters of the Department, at Moor Plantation, Ibadan, I suggested that the first few months of my tour should be spent there, hoping afterwards to be afforded an opportunity, which unfortunately was not forthcoming, of making a more general survey of the insect pests of the country. I have confined my remarks to insects which are to be looked on as real pests, and have made no reference to the bionomics of other insects which I have observed to be associated with the indigenous flora. I have classified the pests according to the plant attacked, and have added to my account of each notes as to the measures found useful in dealing with them.