Document

Fruit Fly control

Vegetation types in Zimbabwe

National Seed Certification in Zimbabwe

Types of appples grown in Zimbabwe

The Agricultural Productivity Program for Southern Africa (APPSA) has been implemented in
Malawi, Mozambique and Zambia. Malawi being a regional center of leadership (RCoL) for maize
based farming systems. The initiative has made a great contribution to the National Agricultural
System and agricultural Development in Malawi. A few, out of many success stories from APPSA
are contained in this publication. This Magazine contains some of the great work that APPSA has
contributed to Agricultural sector in Malawi. So far, APPSA has released 27 improved agricultural
technologies that are already making a tremendous impact in the three countries. APPSA has
also facilitated the promotion of 85 already released technologies. It has trained 43 people on long
term trainings on PhD (10), Masters (23) and Bachelor’s (10) Degree level. It has also sent many
agricultural staff to short term trainings. APPSA has also raised magnificent infrastructure in a
number of research including Chitedze (Lilongwe), Bvumbwe (Thyolo) and Kasinthula (Chikwawa).
These structures included office blocks, laboratories, irrigation facilities, storage facilities
just to mention a few. In general, APPSA project has been holistic in nature and its fruition is still
dripping out.

A diagnostic survey was conducted in July 2017 in two northern districts of Zambia to investigate presence or absence of cassava brown streak disease (CBSD) and its causal viruses. In total, 29 cassava fields were surveyed and cassava leaf samples were collected from 116 plants (92 symptomatic and 24 non-symptomatic). CBSD prevalence was approximately 79% (23 of 29) across fields. Mean CBSD incidence varied across fields but averaged 32.3% while mean disease severity was 2.3 on a 1-to-5 rating scale. Reverse-transcription polymerase chain reaction screening of all 116 samples with one generic and two species specific primer pairs yielded DNA bands of the expected sizes from all symptomatic plants with the generic (785 bp) and Ugandan cassava brown streak virus (UCBSV)-specific (440 bp) primers. All 24 non-symptomatic samples were negative for UCBSV and all samples tested negative with primers targeting Cassava brown streak virus. The complete genome of a representative isolate of UCBSV (WP282) was determined to be 9,050 nucleotides in length, minus the poly A tail. A comparative analysis of this isolate with global virus isolates revealed its nature as a sequence variant of UCBSV sharing 94 and 96% maximum complete polyprotein nucleotide and amino acid identities, respectively, with isolates from Malawi (MF379362) and Tanzania (FJ039520). This is the first report of CBSD and UCBSV in Zambia, thus expanding the geographical distribution of the disease and its causal virus and further reinforcing the need to strengthen national and regional phytosanitary programs in Africa.

Pesticides are essential for the control of infestation of disease, insect pests and weeds on different crops. Due to wide usage of synthetic pesticides which may lead to increased exposure and associated environmental and health risks among small-holder farmers in Zambia, a study was undertaken to understand how knowledgeable farmers are on pesticide use and practices. A total of 418 small scale farmers were randomly sampled from Mkushi, Mpongwe, Luangwa, Mbala, Solwezi, Chipata and Kalomo Districts of Zambia. Data pertaining to types of pesticides use, handling, storage and disposal was solicited using structured questionnaires. The data collected was analyzed using SPSS. Findings revealed that of the sampled farmers 43%, 30%, 25% and 17% used Glyphosate, Dicamba, Paraquat and Atrazine respectively as herbicides in Maize. 21% and 14% used Cypermethrine and Monocrotophos respectively as insecticides in both Maize and Soybean. 81% of the sampled farmers used empty containers for either storing drinking water or salt while only 15% wore protective clothing when applying pesticides. Pesticide mishandling occurred regardless of the amount of experience a farmer had using pesticides. 68% of the sampled farmers had never received any formal basic training in pestic ide use, hence a clear knowledge gap. The fact that receipt of basic training was the main predictor of a farmers’ level of knowledge on pesticide use, a farmer who had received basic training in appropriate chemical pesticides use, as opposed to one who had not, had a better chance of using chemical pesticides safely and in the right quantities.

BACKGROUND:Thispaperdocumentsfarmerperceptionsandmanagementpracticesforfallarmyworm(Spodopterafrugiderda J.E.Smith),providingabaselineforthedevelopmentofsustainablepestmanagementstrategies.
RESULTS:91%offarmerscorrectlyidentifiedfallarmyworm,andreporteditasthemostimportantmaizepestduring2016/2017 cropping season, affecting nearly half of cultivated area. Estimated maize yield loss during the season, attributed to fall armywormwas28%.Amajorityoffarmers(60%)usedpesticidesforfallarmywormcontrol,alongwithothercultural/physical practices – handpickingandcrushingeggmasses/caterpillars(36%),andapplicationofash/sandinthefunnel(19%).Farmers usedvariouspesticideactiveingredients,andprotectivemeasureswereinadequate;>50%offarmersdidnotuseanyprotective measures while spraying. Significantly more male than female farmers used pesticides (P=0.05), and the reverse was true for culturalpractices.Significantmaizeyielddifferences(P=0.001)wereobservedbygender,attributedtodifferencesinutilization of production inputs/practices. At least 77% of farmers received and shared agricultural advice, which can be optimized to spreadinformationonfallarmywormmanagementoptions.
CONCLUSION: Increased use of pesticides to manage fall armyworm poses health and environmental risks, besides the high cost for farmers and governments. Research into cultural and indigenous practices used by farmers will offer opportunities for alternative and sustainable management practices. Research efforts should pay attention to gender differences in access to resources and inputs. Tackling fall armyworm at the farm level, and averting yield losses will require integrated messaging addressingotherproductionrisks. 

Seed quality can have a major impact on potential crop yield. Previous research found that about 60% of the crop yield in small cereals such as rice relies on the varietal genetic potential. In Zambia, Malawi, Mozambique and other developing countries, rice is grown as a food and cash crop by smallholder farmers whose productivity, production and marketing potential are yet to be reached.

Among the biotic stresses that affect cowpea (Vigna unguiculata L) productivity, infestation by cowpea bruchid beetles (Callosobruchus maculatus) is a major problem, causing yield losses of up to 100 %. To alleviate this problem, use of resistant varieties is a feasible approach for small-scale farmers. In Zambia, there are no reported sources of resistance to C. maculatus. The objectives of this study were: i) to evaluate certain cowpea mutants, generated at the University of Zambia, for resistance to C. maculatus; ii) to cluster the tested genotypes based on height, number of pods per plant, 100-seed weight, yield ha-1, number of eggs laid and adult emergence; and iii) to evaluate the candidate mutants for protein content. Experiments were conducted at three locations in 2014/15. The mutants, LT 11-5-2-2, BB 7-9-7-5 and BB-14-16-22, were found to be resistant to C. maculatus across locations and they out-performed their respective parents (p< 0.05) in the degree of resistance to C. maculatus. Cluster analysis, using selected agronomic parameters, showed that the selected resistant mutants (cluster B) were more similar to each other (95 %) than to Namuseba and Msandile (included as susceptible genotypes), which clustered at a similarity level of 78 % (cluster A). The mutants, LT 11-5-2-2, BB 7-9-7-5 and BB-14-16-22, showed resistance to C. maculatus, but their protein content was similar to their parents, indicating that this crucial trait had been maintained in the mutants.