The cassava mealybug is a clear and present threat to the food security and livelihoods of some of the world's most impoverished citizens. Niche models, such as CLIMEX, are useful tools to indicate where and when such threats may extend, and can assist with planning for biosecurity and the...

A description is provided for Ulocladium manihoticola. Nothing is known about the natural habitat of this fungus, the only record being in association with a widely cultivated introduced species (Manihot esculenta). Some information on its dispersal and transmission, and conservation status is...

This study has aimed to carry out a phytosociological survey of weeds in different collection periods, in cassava crops of two varieties grown in two consecutive years. The varieties were Pão, of the sweet class, and Racha-terra, of the bitter class. The weeds surveys were performed at 28, 56, 84,...

To determine the presence of suspected begomoviruses associated with cassava mosaic disease (CMD) symptoms, leaf samples were collected from 5 symptomatic cassava plants in Cameroon and from 3 symptomatic plants in Togo, in August 2014. The presence of Soybean chlorotic blotch virus (SbCBV) and...

A weed survey and a soil seed bank study to identify the weed species in taro (Colocasia esculenta (L.) Schott) and cassava (Manihot esculenta Crantz) farms were completed. For the weed survey, ten farms were randomly selected and in each farm ten quadrats were sampled using a zigzag method of...

Investigation was conducted in Lujiangba Cassava Fields in Yunnan Dry-Hot Area Valley. The results showed that 19 families and 48 species of weeds remarked in cassava field. Among them, alien invasive weed had 9 families and 17 species, among which the dominant weeds were Portulaca oleracea L., ...

A new distribution map is provided for Stictococcus vayssierei Richard. Hemiptera: Stictococcidae. Hosts: cassava (Manihot esculenta), taro (Colocasia esculenta), yam (Dioscorea spp.). Information is given on the geographical distribution in Africa (Cameroon, Central African Republic, Congo, Congo...

The cassava green mites Mononychellus tanajoa and M. mcgregori are highly invasive species that rank among the most serious pests of cassava globally. To guide the development of appropriate risk mitigation measures preventing their introduction and spread, this article estimates their potential...

Xanthomonas axonopodis pv. manihotis is the causal agent of cassava bacterial blight (CBB), a major disease of cassava in tropical and subtropical areas. In August of 2011 and October of 2012, CBB symptoms were observed on 10-month-old field cassava grown in Bonfeba and in Takeledougou,...

A survey for the presence of cassava mealybug (Phenacoccus manihoti) was conducted in Peninsular Malaysia, in 2014. The survey began in Selangor, then extended to 5 other states (Johor, Kedah, Pahang, Perak and Terengganu). Each sample location was recorded using GPS. Mealybug-infested cassava was...